Question

10 mL of a solution contains 0.1 M NH₄Cl + 0.01 M NH₄OH. Which addition would not change the pH of the solution?

(a) Adding 1 mL water 

(b) Adding 5 mL of 0.1 M NH₄Cl

(c) Adding 5 mL of 0.1 M NH₄OH 

(d) Adding 10 mL of 0.1 M NH₄Cl

Answer 1

Correct option: (a) Adding 1 mL water

Explanation: 

Both NH₄Cl and NH₄OH are diluted to same extent;