Question

: Define an acidic salt. Give two examples in an acidic salt.

Answer 1

Hint: The formation of salt generally takes place by the neutralization reaction. In the neutralization reaction we observe that the reaction between acid and base results in the formation of the salt. These salts tend to ionize in water to form acid and bases. There are three types of salt acidic salt, basic salt and amphoteric or neutral salts.

Complete step-by-step answer: The salt which contains replaceable hydrogen atoms in its compound then is referred to as acidic salt. The aqueous solutions of the acidic salt tend to change the litmus from red to blue. The pH or the power of hydrogen or the potential of hydrogen is less than 7 for the acidic salts. This is because of the acidic protons which have been left unreacted when the neutralization reaction to produce salt is taking place. The acidic salt is generally formed by the partial neutralization of the diprotic or the polyprotic acid. They contain ionizable hydrogen ions with another cation.
The example of acidic salt is sodium bisulphite. This salt is prepared by combining the sodium hydroxide with the sulphurous acid. The reaction is the following:
\[{{H}_{2}}S{{O}_{3}}+NaOH\to NaHS{{O}_{3}}+{{H}_{2}}O\]
Here the sulphurous acid has two hydrogen atoms or the acidic protons but only one of them has been replaced. Only one of the acidic protons is neutralised while the other is still free to donate. So sodium bisulphite is an acidic salt.
The other example of acidic salt is \[NaHC{{O}_{3}}\]. It is formed by reacting the carbonic acid with the sodium hydroxide.
\[{{H}_{2}}C{{O}_{3}}+NaOH\to NaHC{{O}_{3}}+{{H}_{2}}O\]
Here the carbonic acid has two hydrogen atoms or the acidic protons but only one of them has been replaced. Only one of the acidic protons is neutralised while the other is still free to donate. So \[NaHC{{O}_{3}}\]is an acidic salt.

Note: The other types of salt are basic salt and neutral salt. The basic salt is formed by the partial neutralization of the strong base by the weak acid. The salt water is considered as the good conductor of electricity. The attractive electrostatic force tends to hold the ions present in the salt together in a chemical bond.