Classification of Salts
Classification of Salts
Classification of Salts:
The different types of salts are: normal salt, acid salt, basic salt and double salt.
1. Neutral Salt: A salt that does not contain any replaceable hydrogen atoms or hydroxyl groups is called a normal salt. Example: Na2 SO4 obtained in the reaction between and NaOH is a normal salt because it is formed by the complete replacement of both the H atoms of
. Similarly, calcium sulphate
sodium phosphate (
) and potassium phosphate (
) are also normal salts.
2. Acid Salt: When an acid is not completely neutralized by a base, the salt produced will contain replaceable hydrogen atoms. Hence, it may further take part in the reaction with the base as an acid. Such a salt is called an acid salt. For example, the salt produced in the reaction between NaOH and
is an acid salt because it is capable of further reaction with the base NaOH to produce the normal salt
.
Thus, an acid salt may be defined as follows: A salt that contains replaceable hydrogen atoms is called an acid salt. Examples: and
are examples of acid salts.
3. Basic salt: When a base reacts with lesser amount of acid than, is necessary for complete neutralization, the salt produced contain hydroxyl group(s)(OH) also. Such a salt is called a basic salt.
Example: Pb(OH)Cl. These salts are called basic salts, because they can further react with the acids to form and the corresponding normal salts. Thus, a basic salt is formed when a base reacts with a lesser amount of an acid than is necessary for the formation of a normal salt
.
Double salt: In a double salt, there are two different negative ions and/or positive ions. For example, the mineral dolomite, ,
, contains both
and
ions. Hence, it is a double salt. Potash alum:
, also is a double salt. Double salts exist only in the solid state. When dissolved in water, they break up into a mixture of two separate salts. For example, when potash alum is dissolved in water, it breaks up as follows.
Which of the following are correct ? (a) Salts formed by the reaction of strong acid with a strong base are called neutral salts . (b) Salts formed by the reaction of a weak acid with a strong base are called acidic salts . | |||
| Right Option : A | |||
| View Explanation | |||
An aqueous solution of the salt is acidic in nature. Which of the following acids and bases react to give this salt? | |||
| Right Option : A | |||
| View Explanation | |||
Basic salts are formed by neutralisation of _________________ | |||
| Right Option : D | |||
| View Explanation | |||
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