A 100 ml portion of water is added to each of the following two solution, then what happens to pH?

Question

A 100 ml portion of water is added to each of the following two solutions:-

(i) 100 ml of 0.02 M KCN

(ii) 100 ml of 0.02 M HCl

Which of the following statements is correct?

(1)  There will be no change in pH of solution (i) & (ii)

(2)  The pH of solution (i) will decrease but pH of solution (ii) will increase.

(3)  The pH of solution (i) will increase but pH of solution (ii) will decrease.

(4)  The pH of (i) will remain same but pH off (ii) will decrease

(5)  The pH of solution (ii) will remain same but pH of (i) will increase.

Answer 1

Here is the answer.