What is the H provided by acid ?? When is acid added and when is water ionized?

Because water is a weak electrolyte, there will be a small amount of hydrogen ions and hydroxide ions in the water (generally pure water provides 10 (-7)mol l of H and OH each).

h2o=(reversible sign) oh- +h+

Therefore, in the calculation of the acid solution, the h provided by the acid is large enough to ignore the hydrogen ions provided by the water, but in other solutions, such as the alkali solution, the hydrogen ions provided by the person cannot be ignored.

In the theory of weak electrolytes, at 20C, [H+][OH-]=K (-14 power of 10) is a constant.

Therefore, when the value = 7, the [h+] ionized by water is about 10-7 power, so 2. When the [h+] provided by the acid is less than 10-6mol l, the [h+] provided by the acid is equivalent to the [h+] provided by the water, and the [h+] ionized by the water cannot be ignored Similarly, when the [h+] provided by the acid is much greater than the [h+] ionized by the water itself, the [h+] ionized by the water itself is negligible.

It should be noted here that the degree of ionization of H2O is related to the pH value, when the acid provides [H+] greater than 10-6mol L, when acidic water contributes less [H+] than 10-8.

Topics involving weak acids, ignoring the ionization of water.

For topics involving non-strong acids and alkaline salts, the ionization of water needs to be considered.

h stands for the element hydrogen or a hydrogen atom.

The second and third questions you ask are not very clear.

I think what you probably mean are acids that ionize hydrogen ions, and which acids don't ionize hydrogen ions?

So in elementary chemistry, all acids need to ionize hydrogen ions, otherwise they don't think they are acids, and they must be ionized hydroxide ions. Because water is the most important thing for living things on earth, and our research is related to water, hydrogen ions and hydroxide ions are linked in the solution (water can weakly ionize hydroxides and hydrogen ions).

However, in a slightly higher chemistry, many predecessors have put forward a lot of new definitions of acids and bases, such as Lewis acid-base theory, which believes that any substance that can give electrons is an acid, and any substance that can accept electrons is a base. There are also theories that everything that can ionize hydrogen ions is an acid, anything that can accept hydrogen ions is a base, and so on, and there are also definitions based on hydroxide ions.

H+ is hydrogen and is a compound that is all hydrogen ions (such as H2SO4, HNO3, HCl). Although there are hydrogen ions, there are compounds with other cations that are not acids (e.g., NaHCO3).

h can represent the element hydrogen or a hydrogen.

Does the second question contain h? If it is, it depends on the classification of acid, junior high school thinks that the cations ionized are all hydrogen ions, which is acid, so Kaizhi acid must have hydrogen element. However, this is not the case according to Lewis acid-base theory, as long as there are empty orbitals, those who can accept electron pairs are counted, for example, metal ions belong to Lewis acid and do not contain hydrogen.

In water, the ratio of H+ and Oh- to water ionization is 1:1, when acid or alkali is added, the ionization equilibrium of water moves in the opposite direction, and the H+ and Oh- ionized by water are reduced, and the reduction is also equal; When adding hydrolyzable salts, the ratio of H+ to OH- ionized by water is 1:1, and the anions of weak acid combine with H+ ionized by water to form weak acid, so that there are more OH- ions in the solution than H+, and the solution is alkaline.

Ag+>Hg2+>Fe3+>Cu2+>H+ (acid-ionized)>Pb2+>Sn2+>Fe2+>Zn2+>H+ (water-ionized)>Al3+>Mg2+>Na+>Ca2+>K+

The reducibility of non-metallic ions is weakened from snatched to weak: S2->SO32->I->Br->Cl->OH->Oxygenate》F-

If you want to be more complete, look for the inorganic textbook of this university, and look at the electrode potential above, which is oxidation, and there are all kinds of ions.

When water is ionized in equilibrium, acetic acid is added, and H+ and OH- ions (ionized by water) are always equal.

In the case of the solution, the H+ concentration will increase and the OH- concentration will decrease.

Acid solution: C (H +) solution = C (H +) acid + C (H +) water.

C(OH-) solution = C(OH-) water.

Because the number of H+ ions produced exceeds the amount of OH- produced, it is weakly acidic.

Who says there's no oh- in acidic solutions? Any aqueous solution has H+ and OH-, it's just a matter of how much. H+>OH- in acidic solution, h+=oh- in neutral solution, and h+oh-pyrrogenic in alkaline solution, isn't it acidic.

Hydrolysis of HCO3-+H2O===H2CO3+OH-ionized HCO3-+H2O===CO3(2-)+H3O+ This substance is hydrolyzed more than ionized, so NaHCO3 is alkaline.

Hydrolysis of HSO3-+H2O===H2SO3+OH-ionized HSO3-+H2O===SO3(2-)+H3O+ This substance is more ionized than hydrolyzed, so NaHSO3 is acidic.

Mass of the metal Relative atomic mass of the metal = number of moles of the metal.

The number of metal moles * the valuation of the compound solution = the number of moles of transferred electrons.

The number of electrons transferred 2 = the number of hydrogen moles.

Number of moles of hydrogen * 2 = amount of hydrogen gas to open the hall. Therefore.