JEE Main Chemistry question

Chemistry Equilibrium JEE Main

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

(A)Adding 1 mL waterCorrect
(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: (A)

Solution

A buffer's pH depends only on the salt/base ratio, which a small dilution

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Question ID VK-136479