Why sodium carbonate is a poly weak acid 15

First of all, sodium carbonate is not a poly weak acid, sodium carbonate is a salt, a strong alkaline weak salt, alkaline, and also a poly weak acid. Multiple weak acids are acids that can ionize more than 2 (including 2) hydrogen ions per molecule during ionization, and are not completely ionized. Carbonic acid is a poly weak acid, and the salt formed by the poly weak acid is a poly weak acid, so sodium carbonate is a poly weak acid.

However, it is not a poly weak acid acid salt, and there should be hydrogen ions in the acid salt, such as sodium bicarbonate (NaHCO3) is an acid salt of multiple weak acids, as well as disodium hydrogen phosphate, sodium dihydrogen phosphate, etc.

Sodium carbonate. It is a polyester of weak salts.

Because carbonic acid is a poly weak acid, the salt formed by multiple weak acids is a poly weak acid.

Acid salts that are not poly weak acids, acid salts that contain hydrogen. Sodium bicarbonate.

It is an acid salt with multiple weak acids.

The number of ionizable hydrogen atoms in the acid is 2, and there is an acid that cannot be completely ionized in the aqueous solution, which is called a dibasic weak acid!

Mainly: carbonic acid (H2CO3), sulfurous acid (H2SO3), oxalic acid (H2C2O4) and so on.

nahco3===na+

HCO3- Because carbonic acid is a weak acid, its acid salt bicarbonate cannot be completely ionized, that is to say, bicarbonate cannot further ionize hydrogen ions and carbonate, so only the above ionization can occur!

And with sodium bisulfate, it's different, because sulfuric acid is a strong acid, so his acid salt is also completely ionized! nahso4===na++h+

so42-

The strength of the acid is determined according to its ability to ionize hydrogen ions in water, the part dissolved in water can be completely ionized is a strong acid, the part ionized is a weak acid, and according to the number of hydrogen atoms contained in the acid, it is determined to be a few yuan acid.

Sodium bicarbonate is a strong base and weak salt, which needs to be ionized in two parts, NaHCO3 = sodium ion + bicarbonate ion.

Bicarbonate ion = (reversible equal sign) hydrogen ion + carbonate example Sorry, I don't know how to play some of the symbols, and I don't know if you can understand it.

In addition to metal ions (or NH4+), the cations formed during ionization include hydrogen, pure nucleus, and anions.

Salts that are acid ions are called acid salts.

Carbonic acid is a weak acid, and there are 2 hydrogen ions in carbonic acid, so sodium bicarbonate.

It is a dibasic weak acid acid of carbonic acid to make digging salt

The ionization of carbonic acid is done in two steps:

h2co3 = h^+ hco3^-

hco3^- h^+ co3^2-

Ionization of 2 hydrogen ions, carbonic acid is a weak acid, the first step of ionization is already very weak, the second step of ionization is even weaker.

Ionization equation for sodium bicarbonate.

Step 1: NaHCO3 (reversible) Na+ HCO3 - Step 2: HCO3- H2O (reversible) H2O CO2 OH- (hydrolysis).

HCO3- (reversible) H- +CO3 2- (ionized) but hydrolysis of sodium bicarbonate in water is the main, and ionization is secondary.

Sodium carbonate is an acid. Sodium carbonate (Na2CO3), molecular weight. The purity of chemicals is mostly above (mass fraction), also known as soda ash, but the classification belongs to salt, not alkali.

Also known as soda or soda ash in international **. It is an important organic chemical raw material, mainly used in the production of flat glass, glass products and ceramic glaze. It is also widely used in household washing, acid neutralization, and food processing.

In the acid-base ionization theory, alkali refers to the fact that all the anions ionized in the aqueous solution are oh-; In acid-base proton theory, a base refers to a substance that can accept protons; In acid-base electron theory, a base refers to an electron donor.

No. First of all, the aqueous solution of sodium sulfide is alkaline. Sodium sulfide is also known as odorous alkali, odorous soda, flavonoid, and sulfide alkali. Sodium sulfide is an inorganic compound, and pure sodium sulfide is a colorless crystalline powder. Strong moisture absorption, soluble in water. The aqueous solution has a strong alkaline reaction.

Secondly, the definition of poly weak acids: weak acids containing two or more ionizable H+ in the molecule are multiple weak acids, and multiple weak acids are weak electrolytes.

Weak acid in high school:

Fluorine (HF), vinegar (HA, that is, acetic acid), carbon (H2CO3), sulfur (H2S), secondary (HCL), cyanide (HCN), silicon (H2SiO3).

Acidity decreases from left to right. 】

1. Originally, it was directly that carbonic acid is a dibasic weak acid (that is, a generalized polyacid), like sodium bicarbonate and sodium carbonate (these two are just salt, don't type less, salt is salt, not acid) and so on are its salts (sodium bicarbonate is its acid salt, sodium carbonate is just its salt) There is no need to talk nonsense anymore (more hungry is to quietly open: sodium carbonate is not a poly weak acid; It's a multi-weak acid salt, not a multi-limb weak acid acid salt), but if you ask, you won't be embarrassed!

2. Sodium carbonate is a salt, which belongs to a strong alkali and weak salt;

In water, CO32- +H2O = (reversible) HCO3- +OH- (primary) HCO3- +H2O = (reversible) H2CO3 + OH- (secondary) hydrolysis of carbonate to produce hydroxide, which makes the sodium carbonate solution alkaline, and can be hydrolyzed step by step (primary hydrolysis is the main), showing "plurality" (don't be confused with the hydrolysis of metals), and because carbonate is the secondary ionized acid group of "carbonic acid" in weak acids, sodium carbonate is a strong alkali and weak salt, overall analysis, It can also be said to be a poly weak acid (but it is generally not called that)!

It's a very boring question in the first year of high school, don't ask more, I don't want to explain too much!

This was explained the other day! It doesn't matter if you don't do further analysis, whether you give a reward or not, the important thing is that you hope to "cook wine and talk about heroes" with real people who are full of learning!

Sodium carbonate is a salt, which belongs to the strong alkali and weak salt;

In water, CO32- +H2O = (reversible) HCO3- +OH- (primary).

HCO3- +H2O = (reversible) H2CO3 + OH- (secondary) hydrolysis of carbonate to produce hydroxide, which makes the sodium carbonate solution alkaline, and can be hydrolyzed step by step (primary hydrolysis is the main), showing "plurality" (don't mix it with the hydrolysis of metals, don't ask more), and because carbonate is the secondary ionized acid group of carbonic acid in weak acid, sodium carbonate is a strong alkali and weak salt, and the overall analysis can also be said to be a poly weak acid (but generally not called so)!

It's a very boring question in the first year of high school, don't ask more, I don't want to explain too much!

Because sodium carbonate dissolves in water, it will form H2CO3, a weak acid... Because one carbonate ion binds two hydrogen ions, it is a weak acid of binary elements.

Carbonic acid is a polyacid.

So carbonate is a polyacidic group.

Carbonic acid is a polyacid, and it is a weak acid. So the salts made up of carbonate are poly weak salts