Translation examples in the paper

Acid oxide commodity: acid oxide

Pinyin: sour foreign language Wu

Chinese name: acid oxide

Description: Acid oxide is an acid that can exchange amino groups with water or an oxide of alkali that can exchange amino groups with salt and water. Generally, they are transition metal oxides of nonmetallic elements and oxides of some high-valence elements. Such as sulfur trioxide SO3, phosphorus pentoxide P2O5, manganese heptaoxide Mn2O7, chromium trioxide CrO3, etc.

We know that salt reacts with acid, alkali and water, reacts with some alkali metal nonmetallic oxides, and also produces salt and water. take for example

2NaOH + H2SO4 = Na2SO4 + 2H2O

2NaOH + CO2 = Na2CO3 + H2O

Calcium hydroxide+SO3 = calcium sulfate+H2O

The above reaction shows that carbon dioxide and sulfur trioxide have similar properties to acids. Therefore, oxides such as carbon dioxide and sulfur trioxide that react with alkali salts and water are called acid oxides.

Most nonmetallic oxides are acid oxides, and the familiar nonmetallic oxides, carbon monoxide and nitric oxide, are usually not included in the acid-free oxides.

Properties and others:

1, most of the acid oxides can be directly combined with water to generate oxyacid.

CO2 + H2O = H2CO3

Low SO3+H2O = H2SO4

SO2+H2O = H2SO3 (sulfite)

2. Oxyacid can also thermally decompose an acidic oxide. For example, trioxide can be heated with sulfuric acid.

A mixture of sulfur and water:

H2SO4 = SO3 ↑ + H2O

Here, sulfur trioxide is considered as the product of dehydration of sulfuric acid, so it is also called the acid oxide of anhydride.

SiO2 _ 2 and N2O5 are also acidic oxides, but silica is insoluble in water and cannot be directly combined with water to form silicate.

3. Judging acid oxide is the most important basis for chemical reaction after elements are combined.

Exceptions:

Silicon dioxide is a more special acidic oxide.

Silicon dioxide can react with hydrofluoric acid, but not with water.

note:

Acid oxides are mainly nonmetallic oxides.

Most nonmetallic oxides are acidic oxides.

Acid oxide containing only oxygen acid

Translation:

Acid oxide name: acid oxide

Pinyin: sour foreign language Wu

Chinese name: acid oxide

Description: Acid oxide is an oxide that can react with water to form acid or with alkali to form salt and water. Generally, they are oxides of nonmetallic elements and high-valence oxides of some transition metal elements. Such as sulfur trioxide SO3, phosphorus pentoxide P2O5, manganese heptaoxide Mn2O7, chromium trioxide CrO3, etc.

We know that alkali reacts with acid to produce salt and water, and alkali reacts with some nonmetallic oxides to produce salt and water. For example,

2NaOH+H2SO4=Na2SO4+2H2O

2NaOH+CO2=Na2CO3+H2O

Calcium hydroxide +SO3 = calcium sulfate +H2O

The above reaction shows that the properties of carbon dioxide and sulfur trioxide are similar to those of acids. Therefore, people call carbon dioxide and sulfur trioxide oxides that can react with alkali to form salt and water acid oxides.

Most nonmetallic oxides are acidic oxides. Among the familiar nonmetallic oxides, carbon monoxide and nitric oxide are not acidic oxides, so they are usually classified as non-acidic oxides.

Nature and others:

1. Most acidic oxides can directly combine with water to form oxyacids.

CO2+H2O=H2CO3

SO3+H2O = sulfuric acid

SO2+H2O = H2SO4 (sulfurous acid)

2. Oxy-acids can also be decomposed by heating to produce acidic oxides. For example, heating sulfuric acid can obtain trioxide.

Sulfur and water:

H2SO4=SO3↑+H2O

Sulfur trioxide can be regarded as the product of dehydration of sulfuric acid here, so acid oxide is also called anhydride.

SiO _ 2 and N2O5 are also acidic oxides, but silica is insoluble in water and cannot be directly combined with water to produce silicic acid.

3. The most important basis for judging acid oxides is that the valence of each element remains unchanged before and after the chemical reaction.

Special circumstances: