Question

1. You are given three materials in the form
of solutions-citric acid, magnesium
hydroxide and sodium sulphate. Describe
how you will classify the substances
as acidic, basic and neutral using
purple cabbage solution.​

Answer 1

Explanation:-

Purple cabbage solution is a natural indicator which changes its colour in acidic , basic and neutral medium.

• When we put the solution of citric acid in purple cabbage solution it turns in to reddish pink which shows that solution is acidic .

• When we put the solution of magnesium hydroxide in purple cabbage solution it turns in to green or yellow which indicates that the solution is basic in nature .

• In case of Sodium sulphate the purple cabbage solution shows purple colour because sodium sulphate is a salt which is neutral in nature.

Hence,

we can able to classify the given solution on the basis of purple cabbage solution.