Question

Q 1)Name a salt whose solution on hydrolysis is 1)acidic 2)basic 3)neutral in nature.Give a balanced quation for tion. Q 2) State what will be the effect of eacheach of the following solutions on blue litmus- 1)K2CO3 soln . 2)KCl soln. 3)NH4NO3 soln.

Answer 1

acidic- ferric chloride in aqueous solution
basic-aqueous solution for sodium carbonate,sodium acetate
neutral-potassium nitrate
K2CO3 red to blue
KCl red to blue
ammonium  nitrate no change

Answer 2

Answer:

For 1: The solution is basic in nature and will not change the color or blue litmus.

For 2: The solution is neutral in nature and will not change the color or blue litmus.

For 3: The solution is acidic in nature and will change the color or blue litmus.

Explanation:

There are three types of solution: acidic, basic and neutral

• When a strong acid and a weak base reacts, it leads to the formation of acidic solution.
• When a strong base and weak acid reacts, it leads to the formation of basic solution.
• When a strong acid and strong base or weak acid and weak base reacts, it leads to the formation of neutral solutions.

There are 2 types of litmus paper:

• Red litmus paper: This paper will turn blue if it is dipped in basic solution and it remains as such if it is dipped in acidic solution.
• Blue litmus paper: This paper will turn red if it is dipped in acidic solution and remains as such if it is dipped in basic solution.

For 1:  $K_2CO_3$

This salt is formed by the combination of potassium hydroxide and carbonic acid.

Potassium hydroxide is a strong base and carbonic acid is a weak acid. So, it will lead to the formation of basic solution.

Basic solutions do not show any effect to blue litmus.

The chemical equation for the hydrolysis of potassium carbonate follows:

$K_2CO_3+2H_2O\rightarrow 2KOH+H_2CO_3$

For 2:  KCl

This salt is formed by the combination of potassium hydroxide and hydrochloric acid.

Potassium hydroxide is a strong base and hydrochloric acid is also a strong acid. So, it will lead to the formation of neutral solution.

Neutral solutions do not show any effect to blue litmus.

The chemical equation for the hydrolysis of potassium chloride follows:

$KCl+H_2O\rightarrow KOH+HCl$

For 2:  $NH_4NO_3$

This salt is formed by the combination of ammonium hydroxide and nitric acid.

Ammonium hydroxide is a weak base and nitric acid is a strong acid. So, it will lead to the formation of acidic solution.

Acidic solutions change blue litmus to red.

The chemical equation for the hydrolysis of ammonium nitrate follows:

$NH_4NO_3+H_2O\rightarrow NH_4OH+HNO_3$