What is the name of na2so4. Trivial names of some inorganic compounds
Trivial names of some inorganic compounds
Currently, chemists know more than 20 million chemical compounds. Obviously, not a single person is able to remember the names of tens of millions of substances.
That is why the International Union of Pure and Applied Chemistry developed systematic nomenclature organic and inorganic compounds. A system of rules has been constructed that allows naming oxides, acids, salts, complex compounds, organic matter etc. Systematic names have a clear, unambiguous meaning. For example, magnesium oxide is MgO, potassium sulfate is CaSO 4, chloromethane is CH 3 Cl, etc.
The chemist who discovers a new compound does not choose its name himself, but is guided by clear IUPAC rules. Any of his colleagues working in any country in the world will be able to quickly construct a formula for a new substance based on its name.
The systematic nomenclature is convenient, rational and accepted throughout the world. There is, however, a small group of compounds for which the “correct” nomenclature is practically not used. The names of some substances have been used by chemists for decades and even centuries. These trivial names more convenient, more familiar, and so firmly ingrained in consciousness that practitioners do not want to change them to systematic ones. In fact, even IUPAC rules allow the use of trivial names.
Not a single chemist will name the substance CuSO 4 5H 2 O copper(II) sulfate pentahydrate. It is much easier to use the trivial name for this salt: copper sulfate. No one will ask a colleague: “Tell me, do you have any potassium hexacyanoferrate (III) left in your laboratory?” But you can even break your tongue! They will ask differently: “Is there any red blood salt left?”
Short, convenient and familiar. Unfortunately, trivial names of substances do not obey any modern rules. You just need to remember them. Yes, yes, the chemist must remember that FeS 2 is pyrite, and under the familiar term “chalk” lies calcium carbonate.
The table below lists some of the most common trivial names for salts, oxides, acids, bases, etc. Please note that one substance can have multiple trivial names. For example, sodium chloride (NaCl) can be called halite, Can i - rock salt.
Trivial name | Substance formula | Systematic name |
diamond | WITH | carbon |
potassium alum | KAl(SO 4) 2 12H 2 O | Aluminum Potassium Sulfate Dodecahydrate |
anhydrite | CaSO4 | calcium sulfate |
barite | BaSO4 | barium sulfate |
Prussian blue | Fe 4 3 | iron(III) hexacyanoferrate(II) |
bischofite | MgCl 2 6H 2 O | magnesium chloride hexahydrate |
borazon | BN | boron nitride |
borax | Na 2 B 4 O 7 10H 2 O | sodium tetraborate decahydrate |
water gas | CO+H2 | hydrogen + carbon monoxide (II) |
galena | PbS | lead(II) sulfide |
halite | NaCl | sodium chloride |
slaked lime | Ca(OH)2 | calcium hydroxide |
hematite | Fe2O3 | iron(III) oxide |
gypsum | CaSO 4 2H 2 O | calcium sulfate dihydrate |
alumina | Al2O3 | aluminium oxide |
Glauber's salt | Na 2 SO 4 10H 2 O | sodium sulfate decahydrate |
graphite | WITH | carbon |
sodium hydroxide | NaOH | sodium hydroxide |
caustic potassium | KOH | potassium hydroxide |
iron pyrite | FeS 2 | iron disulfide |
inkstone | FeSO 4 7H 2 O | iron(II) sulfate heptahydrate |
yellow blood salt | K 4 | Potassium hexacyanoferrate(II) |
liquid glass | Na 2 SiO 3 | sodium silicate |
lime water | solution of Ca(OH) 2 in water | calcium hydroxide solution in water |
limestone | CaCO3 | calcium carbonate |
calomel | Hg2Cl2 | Dimercury dichloride |
rock salt | NaCl | sodium chloride |
cinnabar | HgS | mercury(II) sulfide |
corundum | Al2O3 | aluminium oxide |
red blood salt | K 3 | Potassium hexacyanoferrate(III) |
hematite | Fe2O3 | iron(III) oxide |
cryolite | Na 3 | sodium hexafluoroaluminate |
lapis | AgNO3 | silver nitrate |
magnesite | MgCO 3 | magnesium carbonate |
magnetite | Fe3O4 | |
magnetic iron ore | Fe3O4 | Diiron(III)-iron(II) oxide |
malachite | Cu 2 (OH) 2 CO 3 | hydroxycopper(II) carbonate |
copper shine | Cu2S | copper(I) sulfide |
copper sulfate | CuSO 4 5H 2 O | copper(II) sulfate pentahydrate |
chalk | CaCO3 | calcium carbonate |
marble | CaCO3 | calcium carbonate |
ammonia | aqueous solution NH 3 | ammonia solution in water |
ammonia | NH4Cl | ammonium chloride |
quicklime | CaO | calcium oxide |
sodium nitroprusside | Na 2 | sodium penatcyanonitrosylium ferrate(II) |
oleum | solution of SO 3 in H 2 SO 4 | solution of sulfur oxide (VI) in conc. sulfuric acid |
hydrogen peroxide | H2O2 | hydrogen peroxide |
pyrite | FeS 2 | iron disulfide |
pyrolusite | MnO2 | manganese dioxide |
hydrofluoric acid | HF | hydrofluoric acid |
potash | K 2 CO 3 | potassium carbonate |
Nessler's reagent | K2 | alkaline solution of potassium tetraiodomercurate (II) |
rhodochrosite | MnCO3 | manganese(II) carbonate |
rutile | TiO2 | titanium dioxide |
galena | PbS | lead(II) sulfide |
red lead | Pb 3 O 4 | dislead(III) oxide - lead(II) |
ammonium nitrate | NH4NO3 | ammonium nitrate |
potassium nitrate | KNO 3 | potassium nitrate |
calcium nitrate | Ca(NO3)2 | calcium nitrate |
soda nitrate | NaNO3 | sodium nitrate |
Chilean saltpeter | NaNO3 | sodium nitrate |
sulfur pyrite | FeS 2 | iron disulfide |
sylvin | KCl | potassium chloride |
siderite | FeCO3 | iron(II) carbonate |
smithsonite | ZnCO3 | zinc carbonate |
soda ash | Na 2 CO 3 | sodium carbonate |
caustic soda | NaOH | sodium hydroxide |
baking soda | NaHCO3 | sodium bicarbonate |
Mohr's salt | (NH 4) 2 Fe(SO 4) 2 6H 2 O | ammonium iron(II) sulfate hexahydrate |
corrosive sublimate | HgCl2 | mercury(II) chloride |
dry ice | CO 2 (solid) | carbon dioxide (solid) |
sphalerite | ZnS | zinc sulfide |
carbon monoxide | CO | carbon(II) monoxide |
carbon dioxide | CO2 | carbon(IV) monoxide |
fluorite | CaF2 | calcium fluoride |
chalcocite | Cu2S | copper(I) sulfide |
bleaching powder | mixture of CaCl 2, Ca(ClO) 2 and Ca(OH) 2 | mixture of calcium chloride, calcium hypochlorite and calcium hydroxide |
chromium-potassium alum | KCr(SO 4) 2 12H 2 O | chromium(III)-potassium sulfate dodecahydrate |
aqua regia | mixture of HCl and HNO 3 | a mixture of concentrated solutions of hydrochloric and nitric acids in a volume ratio of 3:1 |
zinc blende | ZnS | zinc sulfide |
zinc sulfate | ZnSO 4 7H 2 O | zinc sulfate heptahydrate |
Note: Natural minerals are composed of several substances. For example, silver compounds can be found in lead glitter. The table, of course, indicates only the main substance.
Substances of the form X n H 2 O are called crystalline hydrates. They include the so-called. "crystallization" water. For example, we can say that copper (II) sulfate crystallizes from aqueous solutions with 5 water molecules. We obtain copper (II) sulfate pentahydrate (the trivial name is copper sulfate).
If you are interested in systematic names, I recommend that you refer to the section “Names of inorganic acids and salts”.
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Currently, chemists know more than 20 million chemical compounds. Obviously, not a single person is able to remember the names of tens of millions of substances.
That is why the International Union of Pure and Applied Chemistry developed systematic nomenclature organic and inorganic compounds. A system of rules has been constructed that allows us to name oxides, acids, salts, complex compounds, organic substances, etc. Systematic names have a clear, unambiguous meaning. For example, magnesium oxide is MgO, potassium sulfate is CaSO 4, chloromethane is CH 3 Cl, etc.
The chemist who discovers a new compound does not choose its name himself, but is guided by clear IUPAC rules. Any of his colleagues working in any country in the world will be able to quickly construct a formula for a new substance based on its name.
The systematic nomenclature is convenient, rational and accepted throughout the world. There is, however, a small group of compounds for which the “correct” nomenclature is practically not used. The names of some substances have been used by chemists for decades and even centuries. These trivial names more convenient, more familiar, and so firmly ingrained in consciousness that practitioners do not want to change them to systematic ones. In fact, even IUPAC rules allow the use of trivial names.
Not a single chemist will name the substance CuSO 4 5H 2 O copper(II) sulfate pentahydrate. It is much easier to use the trivial name for this salt: copper sulfate. No one will ask a colleague: “Tell me, do you have any potassium hexacyanoferrate (III) left in your laboratory?” But you can even break your tongue! They will ask differently: “Is there any red blood salt left?”
Short, convenient and familiar. Unfortunately, trivial names of substances do not obey any modern rules. You just need to remember them. Yes, yes, the chemist must remember that FeS 2 is pyrite, and under the familiar term “chalk” lies calcium carbonate.
The table below lists some of the most common trivial names for salts, oxides, acids, bases, etc. Please note that one substance can have multiple trivial names. For example, sodium chloride (NaCl) can be called halite, Can i - rock salt.
Trivial name | Substance formula | Systematic name |
diamond | WITH | carbon |
potassium alum | KAl(SO 4) 2 12H 2 O | Aluminum Potassium Sulfate Dodecahydrate |
anhydrite | CaSO4 | calcium sulfate |
barite | BaSO4 | barium sulfate |
Prussian blue | Fe 4 3 | iron(III) hexacyanoferrate(II) |
bischofite | MgCl 2 6H 2 O | magnesium chloride hexahydrate |
borazon | BN | boron nitride |
borax | Na 2 B 4 O 7 10H 2 O | sodium tetraborate decahydrate |
water gas | CO+H2 | hydrogen + carbon monoxide (II) | galena | PbS | lead(II) sulfide |
halite | NaCl | sodium chloride |
slaked lime | Ca(OH)2 | calcium hydroxide |
hematite | Fe2O3 | iron(III) oxide |
gypsum | CaSO 4 2H 2 O | calcium sulfate dihydrate |
alumina | Al2O3 | aluminium oxide |
Glauber's salt | Na 2 SO 4 10H 2 O | sodium sulfate decahydrate |
graphite | WITH | carbon |
sodium hydroxide | NaOH | sodium hydroxide |
caustic potassium | KOH | potassium hydroxide |
iron pyrite | FeS 2 | iron disulfide |
inkstone | FeSO 4 7H 2 O | iron(II) sulfate heptahydrate |
yellow blood salt | K 4 | Potassium hexacyanoferrate(II) |
liquid glass | Na 2 SiO 3 | sodium silicate |
lime water | solution of Ca(OH) 2 in water | calcium hydroxide solution in water |
limestone | CaCO3 | calcium carbonate |
calomel | Hg2Cl2 | Dimercury dichloride |
rock salt | NaCl | sodium chloride |
cinnabar | HgS | mercury(II) sulfide |
corundum | Al2O3 | aluminium oxide |
red blood salt | K 3 | Potassium hexacyanoferrate(III) |
hematite | Fe2O3 | iron(III) oxide |
cryolite | Na 3 | sodium hexafluoroaluminate |
lapis | AgNO3 | silver nitrate |
magnesite | MgCO 3 | magnesium carbonate |
magnetite | Fe3O4 | |
magnetic iron ore | Fe3O4 | Diiron(III)-iron(II) oxide |
malachite | Cu 2 (OH) 2 CO 3 | hydroxycopper(II) carbonate |
copper shine | Cu2S | copper(I) sulfide |
copper sulfate | CuSO 4 5H 2 O | copper(II) sulfate pentahydrate |
chalk | CaCO3 | calcium carbonate |
marble | CaCO3 | calcium carbonate |
ammonia | aqueous solution NH 3 | ammonia solution in water |
ammonia | NH4Cl | ammonium chloride |
quicklime | CaO | calcium oxide |
sodium nitroprusside | Na 2 | sodium penatcyanonitrosylium ferrate(II) |
oleum | solution of SO 3 in H 2 SO 4 | solution of sulfur oxide (VI) in conc. sulfuric acid |
hydrogen peroxide | H2O2 | hydrogen peroxide |
pyrite | FeS 2 | iron disulfide |
pyrolusite | MnO2 | manganese dioxide |
hydrofluoric acid | HF | hydrofluoric acid |
potash | K 2 CO 3 | potassium carbonate |
Nessler's reagent | K2 | alkaline solution of potassium tetraiodomercurate (II) |
rhodochrosite | MnCO3 | manganese(II) carbonate |
rutile | TiO2 | titanium dioxide |
galena | PbS | lead(II) sulfide |
red lead | Pb 3 O 4 | dislead(III) oxide - lead(II) |
ammonium nitrate | NH4NO3 | ammonium nitrate |
potassium nitrate | KNO 3 | potassium nitrate |
calcium nitrate | Ca(NO3)2 | calcium nitrate |
soda nitrate | NaNO3 | sodium nitrate |
Chilean saltpeter | NaNO3 | sodium nitrate |
sulfur pyrite | FeS 2 | iron disulfide |
sylvin | KCl | potassium chloride |
siderite | FeCO3 | iron(II) carbonate |
smithsonite | ZnCO3 | zinc carbonate |
soda ash | Na 2 CO 3 | sodium carbonate |
caustic soda | NaOH | sodium hydroxide |
baking soda | NaHCO3 | sodium bicarbonate |
Mohr's salt | (NH 4) 2 Fe(SO 4) 2 6H 2 O | ammonium iron(II) sulfate hexahydrate |
corrosive sublimate | HgCl2 | mercury(II) chloride |
dry ice | CO 2 (solid) | carbon dioxide (solid) |
sphalerite | ZnS | zinc sulfide |
carbon monoxide | CO | carbon(II) monoxide |
carbon dioxide | CO2 | carbon(IV) monoxide |
fluorite | CaF2 | calcium fluoride |
chalcocite | Cu2S | copper(I) sulfide |
bleaching powder | mixture of CaCl 2, Ca(ClO) 2 and Ca(OH) 2 | mixture of calcium chloride, calcium hypochlorite and calcium hydroxide |
chromium-potassium alum | KCr(SO 4) 2 12H 2 O | chromium(III)-potassium sulfate dodecahydrate |
aqua regia | mixture of HCl and HNO 3 | a mixture of concentrated solutions of hydrochloric and nitric acids in a volume ratio of 3:1 |
zinc blende | ZnS | zinc sulfide |
zinc sulfate | ZnSO 4 7H 2 O | zinc sulfate heptahydrate |
Note: Natural minerals are composed of several substances. For example, silver compounds can be found in lead glitter. The table, of course, indicates only the main substance.
Substances of the form X n H 2 O are called crystalline hydrates. They include the so-called. "crystallization" water. For example, we can say that copper (II) sulfate crystallizes from aqueous solutions with 5 water molecules. We obtain copper (II) sulfate pentahydrate (the trivial name is copper sulfate).
If you are interested in systematic names, I recommend turning to the section "
Many people are interested in what sodium sulfate is and what are the features of its use.
The proposed material discusses the properties of this substance, chemical formula, method of administration and possible contraindications.
This component (another name is sodium sulfate) is the definition of a whole class of sulfuric acid salts, the sodium variety, which has the following properties.
Such as:
- Crystalline structure, with diamond-shaped crystals.
- Complete lack of color.
- It is recognized after the reaction of the composition with its content with silver nitrate - a white precipitate is released.
- Boiling and melting under the influence of temperature, without decomposing.
- Characterized by solubility in water.
- Interaction with hydrogen at a calcination temperature of five hundred fifty to six hundred degrees Celsius.
- Sulfuric acid reacts with it.
- Doesn't react with hydrochloric acid oh (hydrogen chloride).
Chemical formula
The anhydrous version of this substance is determined by the chemical formula Na2SO4.
That is, it is a component obtained after combining sodium with sulfate (a compound of sulfur and oxygen), with the oxidation state of sulfur +6.
The mass fraction of sodium in the substance is thirty-two and four tenths percent.
Can be prepared by reacting sulfuric acid with sodium hydroxide, called hydrolysis. Molar mass component is one hundred and forty-two grams per mole.
In the natural environment it is found in the form of the mineral thenardite. May be found in sulfur water, a type of mineral water.
If the ambient temperature does not exceed thirty-four degrees, the compound does not decompose and is relatively stable.
When it is increased and water is added, another state is obtained, called Glauber's salt (sodium sulfate decahydrate - decahydrate crystalline hydrate).
This natural component called mirabilite.
Beneficial features
Thanks to your chemical properties, this component is widely used in various fields.
More details about this in the table:
Where is it used? | Features of application |
In the food industry | It is added to products in the form of a solution. GOST code – E514. Regulates acidity, has whitening properties, increases the shelf life of products, and stabilizes color. Included in fish, canned and confectionery products, and spices. Slows down oxidative processes in wine drinks. Can cause harm to the body, like any other substance designated by the E index, due to the destruction of vitamins B1, E |
In the chemical industry and cosmetics production | Included in the formula of detergent compositions - shampoos (containing laureate sodium sulfate), laundry detergents, dishwashing detergents, etc. Sodium carbonate (soda) is obtained from Glauber's salt. |
In veterinary medicine | Contained in medications necessary to achieve a laxative effect by slowing the penetration of toxic substances through the intestinal walls. Included in other drugs. The chloride of this substance forms glucosamine, a component of chondroitin and other medications intended to restore cartilage tissue in joints. From sodium sulfate, thiosulfate is obtained, produced in ampoules and taken intravenously for poisoning. |
In science | It is used as a dehydrating composition capable of replacing magnesium sulfate to produce barium sulfate by dissociation, copper oxide by electrolysis of this melt, used for laboratory purposes. Low cost and very easy to obtain |
Other areas | Involved in the production of glass products, the metallurgical industry of non-ferrous metals, the production of leather and textile products, and in fertilizers (after combining with ammonium sulfate) |
Medicinal use
For medical purposes, this component is used for:
- Improved bile excretion.
- Slowing down the absorption of poisons.
- Water retention in the body.
- Stimulating the movement of intestinal contents and the functioning of the gastrointestinal tract.
These qualities of the substance are involved in the production of laxative medications.
It is used as a powder taken in the form of an aqueous solution. The effect is achieved five hours after use.
The drug is indicated for use in the following situations:
- For severe intestinal constipation, for their treatment.
- To neutralize food poisoning.
- During antihelminthic treatment.
- On preparatory stage during therapeutic fasting for weight loss.
- For similar purposes in preparation for surgery, for diagnosis, intestinal therapy.
- For rinsing the nose.
However, it should be borne in mind that this remedy should not be taken in the presence of the following diseases and processes:
- Peptic ulcer of the digestive system.
- Appendicitis.
- Inflammatory processes in the abdominal cavity.
- Ulcerative inflammation in the large intestine.
- Acute form of hemorrhoids.
- A sharp decrease in blood pressure.
- General exhaustion.
- Menstrual bleeding.
- Carrying a child.
- Breastfeeding children.
- For older people.
The following side effects are possible:
- The occurrence of intestinal colic.
- Digestive problems.
- Frequent urination.
- Nausea.
Note! This drug is not recommended to be taken for a long period, due to the possibility of disruption of the absorption of food and medications.
Taking the medicine on an empty stomach is most effective. The instructions for preparing the composition are simple: dissolve up to thirty grams of the substance in fifty grams of warm water.
Prescribed dosage:
- Up to thirty grams at a time - for adults.
- One gram per number of years – for children.
However, when taking the drug, you should definitely consult a doctor.
As you can see, this substance has a wide range of applications in a wide variety of industries, including medicine - this is its main area of use.
Useful video
8.1. What is chemical nomenclature
Chemical nomenclature developed gradually over several centuries. As you accumulate chemical knowledge it changed several times. It is being refined and developed even now, which is connected not only with the imperfection of some nomenclature rules, but also with the fact that scientists are constantly discovering new and new compounds, which sometimes turn out to be named (and sometimes even made formulas), using existing rules impossible. The nomenclature rules currently accepted by the scientific community around the world are contained in a multi-volume publication: “IUPAC Nomenclature Rules for Chemistry”, the number of volumes in which is continuously increasing.
You are already familiar with the types of chemical formulas, as well as some of the rules for their composition. What are the names of chemical substances?
Using nomenclature rules, you can create systematic Name substances.
For many substances, in addition to systematic ones, traditional, so-called trivial titles. When they appeared, these names reflected certain properties of substances, methods of preparation, or contained the name of what the substance was isolated from. Compare the systematic and trivial names of the substances given in Table 25.
All names of minerals (natural substances that make up rocks) are also trivial, for example: quartz (SiO 2); rock salt, or halite (NaCl); zinc blende, or sphalerite (ZnS); magnetic iron ore, or magnetite (Fe 3 O 4); pyrolusite (MnO 2); fluorspar, or fluorite (CaF 2) and many others.
Table 25. Systematic and trivial names of some substances
Systematic name |
Trivial name |
|
NaCl | Sodium chloride | Salt |
Na 2 CO 3 | Sodium carbonate | Soda, soda ash |
NaHCO3 | Sodium bicarbonate | Baking soda |
CaO | Calcium oxide | Quicklime |
Ca(OH)2 | Calcium hydroxide | Slaked lime |
NaOH | Sodium hydroxide | Caustic soda, caustic soda, caustic |
KOH | Potassium hydroxide | Caustic potassium |
K2CO3 | Potassium carbonate | Potash |
CO2 | Carbon dioxide | Carbon dioxide, carbon dioxide |
CO | Carbon monoxide | Carbon monoxide |
NH4NO3 | Ammonium nitrate | Ammonium nitrate |
KNO 3 | Potassium nitrate | Potassium nitrate |
KClO3 | Potassium chlorate | Bertholet's salt |
MgO | Magnesium oxide | Magnesia |
For some of the most well-known or widespread substances, only trivial names are used, for example: water, ammonia, methane, diamond, graphite and others. In this case, such trivial names are sometimes called special.
You will learn how the names of substances belonging to different classes are composed in the following paragraphs.
Sodium carbonate Na 2 CO 3 . The technical (trivial) name is soda ash (that is, calcined) or simply “soda.” The white substance, thermally very stable (melts without decomposition), dissolves well in water, partially reacting with it, and an alkaline environment is created in the solution. Sodium carbonate is an ionic compound with a complex anion whose atoms are interconnected covalent bonds. Soda was previously widely used in everyday life for washing clothes, but has now been completely replaced by modern washing powders. Sodium carbonate is obtained using a rather complex technology from sodium chloride, and is used mainly in the production of glass. Potassium carbonate K 2 CO 3. The technical (trivial) name is potash. In structure, properties and use, potassium carbonate is very similar to sodium carbonate. Previously, it was obtained from plant ash, and the ash itself was used in washing. Currently, most potassium carbonate is obtained as a by-product of the production of alumina (Al 2 O 3), used to make aluminum. Due to its hygroscopicity, potash is used as a drying agent. It is also used in the production of glass, pigments, and liquid soap. In addition, potassium carbonate is a convenient reagent for the production of other potassium compounds. |
CHEMICAL NOMENCLATURE, SYSTEMATIC NAME, TRIVIAL NAME, SPECIAL NAME.
1. Write down ten trivial names of any compounds (not in the table) from the previous chapters of the textbook, write down the formulas of these substances and give their systematic names.
2. What do the trivial names “table salt”, “soda ash”, “carbon monoxide”, “burnt magnesia” mean?
8.2. Names and formulas of simple substances
The names of most simple substances coincide with the names of the corresponding elements. Only all allotropic modifications of carbon have their own special names: diamond, graphite, carbyne and others. In addition, one of the allotropic modifications of oxygen has its own special name - ozone.
The simplest formula of a simple non-molecular substance consists only of the symbol of the corresponding element, for example: Na - sodium, Fe - iron, Si - silicon.
Allotropic modifications are designated using alphabetic indices or letters of the Greek alphabet:
C (a) – diamond; -
Sn – gray tin;
C (gr) – graphite; -
Sn – white tin.
In the molecular formulas of molecular simple substances, the index, as you know, shows the number of atoms in the molecule of the substance:
H 2 – hydrogen; O 2 – oxygen; Cl 2 – chlorine; O 3 – ozone.
In accordance with nomenclature rules, the systematic name of such a substance must contain a prefix indicating the number of atoms in the molecule:
H 2 – dihydrogen;
O 3 – trioxygen;
P 4 – tetraphosphorus;
S 8 - octasulfur, etc., but at present this rule has not yet become generally accepted.
Table 26.Numeric prefixes
Factor | Console | Factor | Console | Factor | Console |
mono | penta | nona | |||
di | hexa | soundboard | |||
three | hepta | Undeka | |||
tetra | Octa | dodeca |
Ozone O3– a light blue gas with a characteristic odor, in a liquid state it is dark blue, in a solid state it is dark purple. This is the second allotropic modification of oxygen. Ozone is much more soluble in water than oxygen. O 3 is unstable and even at room temperature slowly turns into oxygen. Very reactive, destroys organic substances, reacts with many metals, including gold and platinum. You can smell ozone during a thunderstorm, since in nature ozone is formed as a result of the action of lightning and ultraviolet radiation on atmospheric oxygen. Above the Earth there is an ozone layer located at an altitude of about 40 km, which traps the bulk of the ultraviolet radiation of the Sun, which is destructive for all living things. Ozone has bleaching and disinfecting properties. In some countries it is used to disinfect water. IN medical institutions To disinfect premises, ozone is used, obtained in special devices - ozonizers. |
8.3. Formulas and names of binary substances
In accordance with general rule in the formula of a binary substance, the symbol of an element with a lower electronegativity of atoms is placed in first place, and in second place - with a higher one, for example: NaF, BaCl 2, CO 2, OF 2 (and not FNa, Cl 2 Ba, O 2 C or F 2 O !).
Since electronegativity values for atoms of different elements are constantly being refined, two rules of thumb are usually used:
1. If a binary compound is a compound of a metal-forming element with
element forming a non-metal, then the symbol of the element forming the metal is always placed in first place (on the left).
2. If both elements included in the compound are elements that form non-metals, then their symbols are arranged in the following sequence:
B, Si, C, Sb, As, P, N, H, Te, Se, S, At, I, Br, Cl, O, F.
Note: It should be remembered that nitrogen's place in this practical series does not correspond to its electronegativity; as a general rule it should be placed between chlorine and oxygen.
Examples: Al 2 O 3, FeO, Na 3 P, PbCl 2, Cr 2 S 3, UO 2 (according to the first rule);
BF 3, CCl 4, As 2 S 3, NH 3, SO 3, I 2 O 5, OF 2 (according to the second rule).
The systematic name of a binary compound can be given in two ways. For example, CO 2 can be called carbon dioxide - you already know this name - and carbon monoxide (IV). In the second name, the Stock number (oxidation state) of carbon is indicated in parentheses. This is done in order to distinguish this compound from CO - carbon monoxide (II).
You can use either type of name, depending on which one is more convenient in this case.
Examples (more convenient names are highlighted):
MnO | manganese monoxide | manganese(II) oxide |
Mn2O3 | dimanganese trioxide | manganese oxide(III) |
MnO2 | manganese dioxide | manganese(IV) oxide |
Mn2O7 | dimanganese heptoxide | manganese oxide(VII) |
Other examples:
If the atoms of the element that comes first in the formula of a substance exhibit only one positive oxidation state, then neither numerical prefixes nor the designation of this oxidation state in the name of the substance are usually used, for example:
Na 2 O – sodium oxide; KCl – potassium chloride;
Cs 2 S – cesium sulfide; BaCl 2 – barium chloride;
BCl 3 – boron chloride; HCl – hydrogen chloride (hydrogen chloride);
Al 2 O 3 – aluminum oxide; H 2 S – hydrogen sulfide (hydrogen sulfide).
1. Make up systematic names of substances (for binary substances - in two ways):
a) O 2, FeBr 2, BF 3, CuO, HI;
b) N 2, FeCl 2, Al 2 S 3, CuI, H 2 Te;
c) I 2, PCl 5, MnBr 2, BeH 2, Cu 2 O.
2.Name each of the nitrogen oxides in two ways: N 2 O, NO, N 2 O 3, NO 2, N 2 O 4, N 2 O 5. Emphasize more user-friendly names.
3. Write down the formulas of the following substances:
a) sodium fluoride, barium sulfide, strontium hydride, lithium oxide;
b) carbon(IV) fluoride, copper(II) sulfide, phosphorus(III) oxide, phosphorus(V) oxide;
c) silicon dioxide, diiodine pentoxide, diphosphorus trioxide, carbon disulfide;
d) hydrogen selenide, hydrogen bromide, hydrogen iodide, hydrogen telluride;
e) methane, silane, ammonia, phosphine.
4. Formulate the rules for compiling formulas for binary substances according to the position of the elements that make up this substance in the system of elements.
8.4. Formulas and names of more complex substances
As you have already noticed, in the formula of a binary compound, the first place is the symbol of a cation or an atom with a partial positive charge, and the second is the symbol of an anion or an atom with a partial negative charge. Formulas and more are compiled in the same way complex substances, but the places of atoms or simple ions in them are occupied by groups of atoms or complex ions.
As an example, consider the compound (NH 4) 2 CO 3. In it, the formula of the complex cation (NH 4) is in first place, and the formula of the complex anion (CO 3 2) is in second place.
In the formula of the most complex ion, the symbol of the central atom, that is, the atom to which the remaining atoms (or groups of atoms) of this ion are associated, is placed first, and the oxidation state of the central atom is indicated in the name.
Examples of systematic names:
Na 2 SO 4 sodium tetraoxosulfate(VI),
K 2 SO 3 potassium(II) trioxosulfate(IV),
CaCO 3 calcium(II) trioxocarbonate(IV),
(NH 4) 3 PO 4 ammonium tetraoxophosphate(V),
PH 4 Cl phosphonium chloride,
Mg(OH) 2 magnesium(II) hydroxide.
Such names accurately reflect the composition of the compound, but are very cumbersome. Therefore, abbreviated ones ( semi-systematic) names of these compounds:
Na 2 SO 4 sodium sulfate,
K 2 SO 3 potassium sulfite,
CaCO 3 calcium carbonate,
(NH 4) 3 PO 4 ammonium phosphate,
Mg(OH) 2 magnesium hydroxide.
The systematic names of acids are composed as if the acid is a hydrogen salt:
H 2 SO 4 hydrogen tetraoxosulfate(VI),
H 2 CO 3 hydrogen trioxocarbonate (IV),
H 2 hydrogen hexafluorosilicate (IV). (You will learn about the reasons for using square brackets in the formula of this compound later)
But for the most well-known acids, nomenclature rules allow the use of their trivial names, which, together with the names of the corresponding anions, are given in Table 27.
Table 27.Names of some acids and their anions
Name |
Formula
SEMI-SYSTEMATIC NAMES OF ACIDS AND SALTS. |