The partial neutralization of polybasic acidsgives acids salts. Acid salts containreplaceable H atoms.As you can see from the following reaction:H2SO4+ NaOH ---------> NaHSO4+ H2O. NaHSO4 contains one replaceable hydrogenatom so it is acid salt.A polybasic acid is the acid with more thanone replaceable hydrogen atom.Examples:Dibasic sulphuric acid (H SO )Tribasic phosphoric(V)

Partial neutralization of a polybasic acid gives an acid salt.

Explanation:
When a polybasic acid reacts with a base, it undergoes neutralization reactions. A polybasic acid is an acid that contains more than one ionizable hydrogen atom. These hydrogen atoms can be neutralized by a base, resulting in the formation of salts.

Acid Salt:
An acid salt is formed when only a fraction of the acidic hydrogen atoms in a polybasic acid are neutralized by a base. This means that some of the hydrogen atoms remain ionizable and can still exhibit acidic properties.

Example:
One example of a polybasic acid that can form an acid salt upon partial neutralization is sulfuric acid (H2SO4). Sulfuric acid is a diprotic acid, meaning it has two ionizable hydrogen atoms. When it reacts with a base like sodium hydroxide (NaOH), only one of the hydrogen atoms is neutralized, while the other remains ionizable.

The reaction between sulfuric acid and sodium hydroxide can be represented as follows:
H2SO4 + NaOH → NaHSO4 + H2O

In this reaction, one hydrogen atom from sulfuric acid is neutralized by sodium hydroxide, forming sodium hydrogen sulfate (NaHSO4), which is an acid salt. The remaining hydrogen atom in the acid can still react with a base to form a normal salt.

Conclusion:
Partial neutralization of a polybasic acid results in the formation of an acid salt. In the example mentioned, sulfuric acid reacts with sodium hydroxide to form sodium hydrogen sulfate, which is an acid salt. It is important to note that the degree of neutralization determines the type of salt formed.