How to pronounce chemical formulas, such as what acids

Oxygenated acid, permanganic acid, KMNO4 potassium permanganate.

This should be the business of the junior high school chemistry teacher.

The mno4 in KMNO4 is called permanganate, which is an atomic group, and all the salts composed of acid and typical metals are read as "a certain acid", and the "so" in front of it refers to an element in the acid root, and "a certain one" refers to a typical metal. Acid is the part that is left after the acid has removed the hydrogen atom or part of the hydrogen atom. KMNO4 reads potassium permanganate Na2CO3 reads sodium carbonate.

Aerobic elements don't necessarily read, like MMO4 in KMNO4 – is an acid ion. For example, SO4 2- is read as sulfate ions, CO3 2- is read as carbonate ions, this kind of ions are different from gases, and gases generally need to be read if they contain oxygen, such as carbon dioxide CO2, etc. As for reading acid, it is to read acid when a chemical formula is expressed as a salt (e.g., sodium carbonate, Na2CO3, etc.) or an acid (e.g., sulfuric acid, H2SO4, etc.).

Oxygenated acids in the shape of HNXOM, aqueous solutions of H2X and HX are anaerobic acids. Whether it is an oxygenated acid or an anaerobic acid, it is related to element X. For example, H2SO4 is read as sulfuric acid, while the aqueous solution of H2S is read as hydrosulfuric acid.

For example, HCO3 is read as chloric acid, and the aqueous solution of HCl is read as hydrochloric acid or hydrochloric acid according to its common name.

Mno4- is an ionized manganate, so KMno4 is read as potassium manganate.

Mno4 is a group of atoms called manganate.

In junior high school, you need to master atomic clusters, first see if there are atomic clusters. For example, CO3 is carbonate. CaCO3 is called calcium carbonate.

When you read it, you usually read it in front.

Compounds that are all hydrogen ions produced by ionization are acids such as HCIO, H2SO4, H2S, HF, HCI, HNO3

The reading of the chemical formula is to read the name of the chemical substance directly. For example: h2

o, pronounced "water". When there is more than one atom in a molecule, the number of particles is also read out, such as "p2."

o5" is read as phosphorus pentoxide.

The chemical formula is generally read from right to left as "x-x", such as "cuo" as copper oxide. Or read the name of the chemical substance directly. For example: h2

o, pronounced "water". When there is more than one atom in a molecule, the number of particles is also read out, such as "p2."

o5" is read as phosphorus pentoxide. There are clusters of atoms with acid to be pronounced as "x acid x", as in "cuso4".

Reads copper sulfate. Others should read "hydroxide X", such as "Naoh" called sodium hydroxide. Also pay attention to the valency of iron when reading iron-containing compounds, +3 valence is read as iron (e.g., "FeCl3

is pronounced as "ferric chloride"), and 2-valent is read as ferrous (as in "FeCl2

read as "ferrous chloride"). If there is crystal water, the number of crystal water should be read out first, and read it as "x, hydrate x", such as "cuso4".

5H2O" is read as "copper sulfate pentahydrate" (note: the number of crystal water is 1, and the number should also be read as "X monohydrate").

1.Calculate the relative molecular mass:

The relative atomic mass of the same element is multiplied by its number of atoms, and the relative atomic masses of different atoms are added.

2.Calculate the mass ratio of each element in the constituent substance:

The mass ratio of each element in a chemical formula is the ratio of the sum of the relative atomic masses of each element.

3.Calculate the mass of an element in a compound:

Formula: Mass of an element in a compound = Mass of the compound Mass fraction of an element.

<>1. What is a chemical formula?

A chemical formula is an expression that uses chemical symbols to express the elemental composition and structure of a chemical substance. A chemical formula consists of symbols and subscripts of chemical elements, and through different permutations and combinations, it is possible to describe the types of chemical substances, the composition of the elements, and the way in which atoms are connected to each other.

Second, the basic composition of the chemical formula

1.Chemical Element Symbols: Element symbols are used in chemical formulas to represent chemical elements, for example, oxygen is represented by the symbol "O" and carbon is represented by the symbol "C".

2.Subscript: The subscript is located in the lower corner of the right silver shout of the element symbol and is used to indicate the amount of the element present in the chemical substance, and only acts on the element symbol immediately to the left of it. For example, in the chemical formula H2O, the subscript "2" indicates that the presence of hydrogen is 2.

3. Representation of common chemical formulas

1.Molecular Formula: The molecular formula is used to represent the chemical formula of a molecular compound, which consists of the symbol of the chemical element and the subscript, and the chemical bond indicates the way in which the atoms are connected. For example, the molecular formula of water is H2O, which means that it contains 2 hydrogen atoms and 1 oxygen atom.

2.Ionic formula: The ionic formula is used to denote the chemical formula of an ionic compound, which consists of the chemical element symbol and subscript of positive and negative ions. For example, the ionic formula of sodium chloride is Na+Cl-, which means that there is 1 sodium ion and 1 chloride ion in it.

Fourth, the representation of special chemical formulas

1.Structural Formula: A structural formula is a graphical representation used to show the connections and spatial configurations between atoms in a chemical molecule. The structural formula provides a more visual representation of the structure of the molecule and the type of chemical bond, for example, the structural formula of ethanol is CH3CH2OH.

2.Simplification: Simplification is a simplified representation of a chemical formula that describes polymers of long-chain compounds or repeating units. Simplified units are indicated by parentheses and subscripts, e.g. (CH2)n for polyethylene.

5. Reading of chemical formulas

The reading of the chemical formula is usually determined by the English name of the corresponding element. For example, the chemical formula H2O can be read as "water"); The chemical formula NaCl can be read as "sodium chloride".

Summary: A chemical formula is an expression that uses chemical symbols to represent the elemental composition and structure of a chemical substance, consisting of a chemical element symbol and a subscript.

Common chemical formulas include molecular formula, ionic formula, structural formula and simplified formula, etc., which are used to represent the chemical composition of molecular compounds, ionic compounds, molecular structures and polymers, respectively. The reading of the chemical formula is usually determined by the English name of the corresponding element. Chains.

suān 。

Detailed explanation. 1) (Shape sound. From 酉 ( yǒu), "酉" is one of the radicals of the Chinese character. From "unitary", it is related to wine, cheese, etc. Original meaning: vinegar).

2) Same as vinegar. Such as: sour vinegar (i.e. vinegar. Because of its sour taste, hence the name).

3) Vinegar-like smell or taste [sour; tart]

The apricots are not ripe and too sour.

4) Another example: sour and spicy (sour and spicy); sour and bitter (sour and bitter); Sour (sour and thin liquor).

5) Specifically refers to gastric acid, gastric juice [gastric juice]. Such as: acid water (gastric juice).

6) One of the miscellaneous plays, mainly playing the role of young literati, so it is also used as a contemptuous term for literati [scholar].

"Lonely" is an official; "Sour" means Xiushi. Where it is called "sour", it is said that the end of the show is also on the spot. ——Qing · Jiao Xun "Drama Talk".

7) Light rain [drizzle]. Such as: sour (the appearance of light rain).

8) Acid substance name [acid]. A compound that reacts with a base to form a salt (such as hydrochloric acid, sulfuric acid, or benzoic acid); If soluble in water, its aqueous solution has a sour taste, which can make litmus paper turn red and react with certain metals (such as iron, zinc, tin) to release hydrogen; A hydrogenated compound (HX) that produces hydronium ions (e.g., H3O+ and anions X) in an aqueous solution with a dilute solution that ionizes almost completely, a weak acid (e.g., acetic acid or benzoic acid) may be ionized to only one percent, and a very weak acid (e.g., hydrocyanic acid or boric acid) is ionized to much less than one percent.