Question

aqueous solution of potassium oxide changes the colour of litmus paper? give reasion​

Answer 1

Answer:

A red litmus paper when dipped in an aqueous solution of potassium acetate turned blue. The observations are as follows:

(i) Identification of positive and negative radicals.

(ii) Writing ionic equation for the reaction of positive and negative radicals with water.

(iii) Identification of spectator ions.

(iv) Writing the net reaction taking place.

(v) Identification of free ions which caused the colour change of the litmus paper.

Explanation:

Answer 2

Answer:

Litmus paper is used to test whether the given solution is acidic or alkaline in nature. Litmus paper is a natural indicator. Indicators are red in acids and blue in bases. In other words, acids change blue litmus paper to red; bases change red litmus paper to blue. MgO, K

2

O and ZnO are basic oxides while CO

2

is the acidic oxide.

So, the given acidic oxide of carbon, i.e., carbon dioxide turns blue litmus