What are the acids and alkaline oxides that need to be mastered in high school? My difficulty .

Carbon dioxide, sulphur dioxide.

Acid oxides are:Carbon dioxide, sulfur dioxide, sulfur trioxide,Silica, phosphorus pentoxide, nitrous pentoxide, etc.

Basic oxides are: potassium oxide, calcium oxide.

Sodium oxide, barium oxide, magnesium oxide, ferric oxide.

Copper oxide, mercury oxide, silver oxide, etc.

Common acid oxides include carbon dioxide CO2, nitrous pentoxide N2O5, sulfur trioxide SO3, sulfur dioxide SO2, heptachlorohydride Cl2O7, silicon dioxide SiO2, etc., and the ** oxides of transition group elements are generally acidic oxides. CO, NO, etc. are not acidic oxides or alkaline oxides, but are not salt oxides.

Water is a special oxide.

Other. 1. Most of the acidic oxides can be directly combined with water to form oxygenated acids.

CO2 + H2O = (reversible) H2CO3.

so3+h2o=h2so4。

SO2 + H2O = (reversible) H2SO3 (sulphurous acid).

2. Oxygenated acids can also be decomposed by heat to form acidic oxides. For example, sulphurous acid can be heated to obtain sulfur dioxide and water

h2so3=so2+h2o。

Here, sulfur dioxin can be seen as a product of sulfurous acid dehydration.

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

3. The most important basis for determining acid oxides is chemical reaction.

The valence of the elements before and after.

Remain the same. 4. It is composed of two elements, one of which is oxygen.

Iron oxides（fe₂o₃）、Sodium oxide(na o) and so on.

Basic oxides.

It refers to a hunger god oxide that dissolves in water and only produces a base or reacts with acid to produce only salt and water. Basic oxides are all oxides of metal elements, their alkalinity varies greatly, some (such as sodium, calcium, magnesium oxides) are easily combined with hydration and can quickly and completely neutralize with all acids. Heavy metal oxides are only weak bases, which are insoluble in water or do not interact with water and can only neutralize with more acidic substances.

Basic oxides include active metal oxides and valence oxides of other metals such as Na2O, CAO, Bao and CROs. The corresponding hydrate of basic oxides is alkali. For example, the hydrate corresponding to CaO is Ca(OH)2 and the hydrate corresponding to Na2O is NaOH.

However, if the corresponding hydrate is an insoluble base, its oxide does not react with water, such as copper oxide.

Does not react with water, alkali metal.

Sodium, potassium, etc., as well as calcium and barium oxides can react with water to form the corresponding hydroxide rotten spring. They are all strong bases:

na2o+h2o=2naoh

cao+h2o=ca(oh)2

Acid Oxides:Carbon dioxide, sulfur dioxide, sulfur trioxide,Basic oxides: sodium oxide, calcium oxide.

Acidic oxides are a class of oxides that react with alkalis to form only one type of salt and water. Most of the non-metallic oxides are acidic oxides, some transition elements.

** oxides (such as CRO3, MN2O7, etc.) are also acidic oxides. Acidic oxides belong to anhydrides.

For example, SO2 is called thioanhydride, SO3 is called sulfur anhydride, and CO2 is called carbon anhydride.

Acetic anhydride is an acid anhydride but not an acidic oxide.

The hydrate corresponding to the acid oxide is oxygenated acid, such as the hydrate corresponding to SO3 is H2SO4, the hydrate corresponding to CO2 is H2CO3, and the hydrate corresponding to SiO2 is H2SiO3, etc. Most of the acidic oxides can be directly combined with water to form oxygenated acids, and a few acidic oxides (SiO2) cannot react directly with water. Acid oxides are generally prepared by direct oxidation of non-metals or thermal decomposition of oxygenated acids and oxytates.

Most of the non-metallic oxides are acidic oxides, and among the non-metallic oxides we are familiar with, carbon monoxide.

Nitric oxide is not an acid oxide because it is not an acid oxide because it is not classified as an acid oxide because of its properties. NO2 N2O, etc. are also not acidic oxides.

Acidic oxides include all oxides with an acidity index greater than 1. A typical acidic oxidation deficit is quartz (SiO2) with an acidity index of 2 and its solubility in the alkaline flux lim with an acidity index of 1.

It is larger than in other large oxides, and less soluble in acidic fluxes. Oxides rich in Al2O3, P2O5 and SO3 are similar.

The pin-trapped brightness of acid oxides is characterized by a positive slope of the solubility curve. Similar to the case of basic oxides, lithium oxide is more than lim.

Higher levels of fluxes and these acidic oxides have better compatibility, but this flux flows better and crystallizes more easily.

Basic oxides: Na2O, CAO, BAO and CRO, MNO acid oxides: such as sulfur trioxide SO3, perpenitra pentoxide decay phosphos P2O5, Qiming such as manganese oxide Mn2O7, chromium trioxide CRO3, etc.

Basic: NaO, K2O, CaO, MGO, Al2O3, ZNO, Fe2O3Acidic: CO2, SO2, SiO2, hope you are satisfied.

In junior high school, metal oxides should be basic, non-talk commare metals are acidic, and after high school, you will learn about amphoteric oxides, such as AL, ZN, etc. finger oxides (junior high school still thinks they are basic) After college, transition metals will have the law of ** acid and low price alkali What are the questions?

In high school, the acidic oxidation cavity tolerant material mu of reed was learned.

There are: CO2, SO2, SO3, SiO2, P2O5, N2O5, Cl2O7, MN2O7, etc.

Basic oxides.

There are: K2O, CAO, Na2O, Bao, MGO, Fe2O3, PBO, Cuo, Hgo, AG2O, etc.

The acidic oxides that must be memorized in high school are O, P O, Mn O, and CRO.

Acidic oxides will have relative oxygenated acids, such as HCO3 matching CO2, HNO3 matching N2O5, etc., that is, the valency of the element in the oxygenated acid is the same as the valency in the oxide of the element. For example, NO2 does not have a relative oxygenated acid, so NO2 is not an acidic oxide, and permanganate HMno4 has a relative acidic oxide MN2O7. Basic oxides are usually cheerful metal oxides, but amphoteric oxides such as Al2O3 and BEO and acid oxidation such as Mn2O7 should be removed.

Note. 1. Most of the acidic oxides are non-metallic oxides.

2. Most of the non-metallic oxides are acidic oxides.

3. Only oxygenated acids have acidic oxides.

4. Carbon monoxide, nitric oxide, and nitrogen dioxide are not acidic oxides.

It can react with acid to form salt and water, and this kind of Hutan oxide is called alkaline oxide (and the product can only have salt and water, and can not be generated by any other substance).Basic oxides include active metal oxides and low-valent oxides of other metals, such as Na2O, CaO, Bao and Cro, MnoThe corresponding hydrate of basic oxides is alkali.

For example, the hydrate corresponding to CaO2 is Ca(OH)2, and the hydrate corresponding to Fe2O3 is Fe(OH)3Alkali metals and oxides of calcium, strontium and barium can react with water to form corresponding hydroxides. They are all strong bases:

na2o＋h2o==2naoh

cao＋h2o==ca（oh）2

At high temperatures, basic oxides and acidic oxides react to form salts

cao＋sio2==casio3

Alkaline oxides are relatively stable when heated and generally do not decompose.

Basic oxides are all metal oxides, while metal oxides are not necessarily basic oxides, such as Mn2O7 is an acid oxide, and Al2O3 is an amphoteric oxide.

The oxide that can react with water to form the corresponding trouser-shaped tung alkali is an alkaline oxide. Basic oxides are generally metal oxides.

However, some metal oxides are not classified as basic oxides.

Such as Mn2O7 (acid oxide).

Al2O3 (amphoteric oxide).

Na2O2, (peroxide).

KO2 (superoxide) and so on.

1. Sodium oxide. Oxidation of Nahuang alkaline oxide, chemical judgment of Na2O, molecular weight, off-white amorphous flakes or powders. Sodium oxide is sensitive to tears, easy to deliquescent, and violently reacts with water to form sodium ammonia.

2, Lianhua card. Tonghua brand is a sincere oxygen year-old withering substance, the molecular formula is K20, colorless cube product, density, 350 decomposition, easy deliquescent, soluble in the well digging bird with the hydration synthesis to form an oxidation clock, mainly used in the inorganic industry, is the manufacture of various salts such as oxygen oxidation barrier, the basic raw materials for use, nitrate potassium, potassium acetate, red alum, etc.

3. Oxidized cake. Oxidation by the spring city oxide, gray-white to ha-green amorphous powder, often appears in soft manganese ore and manganese nodules, oxidation is very useful in organic chemistry, is used for the oxidation of oxides of the form of different forms, because the oxidation technology has a plurality of knots, the chemical formula can be written as mno2 x(h20jn, where x is between 0 to 0, surface n can be greater than 0