Do acid salts ionize hydrogen ions in water?

According to the knowledge of chemistry in secondary school, there are only acid salts with multiple strong acids such as sulfuric acid, and its pH value is lower because it directly ionizes more hydrogen ions.

The reason why the pH value of other acid salts is larger than the corresponding positive salt is that the ionization constant from the second ionization is much smaller than that of the previous ionization, for example, the secondary ionization constant of carbon dioxide is about 1/10,000 of the first ionization constant, so the hydrolysis tendency of carbonate in water is much greater than that of bicarbonate, and OH-hydroxide is released after hydrolysis, so the pH value of the normal salt becomes larger than that of the acid salt (HCO3- is still mainly hydrolyzed and alkaline in acid salt).

In fact, the acid salts corresponding to strong acids are not completely ionized. The secondary ionization of NaHSO4 is only about 30% at room temperature. In the case of sulfuric acid, it is inhibited by first-order ionization, and the ionization constant is smaller.

It is only at the secondary school level that strong acids are considered to be completely ionized for convenience. Of course, strong acids have a much greater degree of ionization than weak acids, and the ionization constants of weak acids and their acid salts are generally expressed by scientific notation with negative exponents. The pH is the negative logarithm of the H+ concentration, and although the ionization of the weak acid is very weak, a slight increase in the H+ concentration can cause a significant decrease in pH.

Hydrogen ions can be ionized.

If the secondary ionization of sulfuric acid is regarded as complete ionization, there is only a strong acid acid salt such as sulfuric acid, and his pH is smaller because of the direct ionization of hydrogen ions.

Reasons why other acid salts have a higher pH than their corresponding normal salts.

It is because the ionization constant of the latter ionization is less than that of the previous ionization, for example, the secondary ionization constant of carbonic acid is much smaller than the first-order ionization constant, so the hydrolysis tendency of carbonate in water is much greater than that of bicarbonate, and OH-hydroxide is released after hydrolysis, so the pH value of the positive salt becomes larger.

Yes, the acidity of acid-type salts of strong acids can be equivalent to strong acids.

For example, NaHSO4 is the same as HCl solution of the same concentration.

The ionization of weak acids such as HCO3- is much smaller.

However, the principle that causes the pH of the acid salt to be less than the normal salt is basically the same, and hydrolysis can also be considered.

It's just a matter of degree.

That's it..

Acid salts are cations formed during ionization, in addition to metal ions (or NH4+), there are also hydrogen ions, and anions are salts with acid ions.

So the aqueous solution of acid salt is acidic.

It ionizes hydrogen ions in water.

Hydrochloric acid is a strong electrolyte.

It can be completely ionized, and the ionization equation is not as follows: HCl=H + Cl - barium hydroxide.

It is a strong electrolyte, which can be completely ionized, and the ionization equation is: BA(OH) 2 = BA2+ +2OH - aluminum sulfate.

It is a strong electrolyte, which can be completely ionized, and the ionization equation is: AL 2 (SO4 ) 3 2AL 3+ +3SO4 2- so the answer is: HCl=H + Cl - BA(OH) 2 =BA 2+ +2OH - Quiet Lead AL 2 (SO4 ) 3 2AL 3+ +3SO4 2-

Acid ionization out of h is, by h oh = kw = 1 10 -14

Therefore, the concentration of OH is 1 10 -12, so the h of hydropower is 1 10 -12

The process you described is basically correct, but what needs to be corrected is:

As long as it is an aqueous solution, no matter what the substance is, the product of the concentration of hydrogen ions in the water and the ions in the hydrogen and oxygen segments is equal to the ion product kw=

For example, NH4Cl is added to water, hydrolysis, the macroscopic hydrogen ions in the solution increase, the pH decreases, and the KW remains unchanged at this time, and the change is the respective concentrations of hydrogen ions and hydroxide ions.

It is not necessarily acids that can ionize hydrogen ions.

According to acid, it refers to a compound in which all cations produced during ionization are hydrogen free ions, and hydrogen ions that can be ionized are not necessarily acids, such as sodium bisulfate solution, which can ionize hydrogen ions, but belong to salts.

Summary. Look at whether the acid and base reaction is based on the total number of hydrogen ions or the ionized hydrogen ions.

In the theory of acid-base ionization, the definition of acid-base is: all cations ionized in aqueous solution are all H+ substances called acids; The ionized anions are all oh-, and the substance is called a base. The essence of the acid-base reaction is the reaction of H+ combined with OH- to form water.

The acidity and alkalinity of the aqueous solution is measured by the concentration of hydrogen ions in the solution and the concentration of hydroxide ions, that is, the greater the concentration of hydrogen ions, the stronger the acidity; The greater the concentration and harmony of hydroxide ions, the stronger the alkalinity. When the concentration of one of the hydrogen ions or hydroxide ions increases, the concentration of the other will inevitably decrease, and acids and bases are opposites. The pH is expressed by the pH value, pH=7 is neutral, the smaller the pH, the stronger the acidity of the solution; The higher the pH, the more alkaline the solution becomes.

The theory of acid-base ionization points out that the various acids and bases are not necessarily the same, some reach more than 90%, and some only 1%.

If the acid is weak, it also depends on the ionized hydrogen ions.

Sure. Strong acids are all ionized.

The hydrogen ions ionized from water in hydrochloric acid and ammonia water at the same concentration are not equal, but they are not very different.

The reason is that acid or base inhibits the ionization of water, that is, the "big head" of hydrogen ions or hydroxide ions in the solution is not water, but acid or base ionization.

For example, in a hydrochloric acid solution with pH = 1, the concentration of hydrogen ions and hydroxide ions ionized by water [H+] OH-] 10 -13 (the error is small and can be considered equal).

In ammonia water with pH = 13, the concentration of hydrogen ions ionized by water is the same as [H+] OH-] 10 -13

This expression is roughly the expression in high school chemistry questions, which makes people feel very angry.

At room temperature, the total hydrogen ion concentration in the aqueous solution, the sum of the hydrogen ions ionized by water and other electrolytes, and the total hydroxide ion concentration in the solution meet the equation: [h+]*oh-]=10 -14 Therefore, if the hydroxide concentration or pH is obtained, the total concentration of hydrogen chain carrying ions can be obtained, and the concentration of hydrogen ions ionized by water or hydrogen ions ionized by electrolyte can be used, and another one can be introduced. ,5,Hydrogen ion shed in solution slow volt = hydrogen ions ionized by water + hydrogen ions ionized by electrolyte ionization (or salt hydrolysis), 1,Hydrogen ions in the solution can have hydrogen ions in acidic solution or alkaline solution, with different concentrations and different pH values, while the concentration of hydrogen ions and hydroxide ions in pure water is the same, pH = 7, neutral.

0, there is no difference, the concentration of hydrogen ions ionized by water is very low, 0, what is the relationship between the hydrogen ions ionized by water and the hydrogen ions in the solution.