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The solution which consumes [H^+] or [(O...

The solution which consumes `[H^+]` or `[(OH)^-]` or both simultaneously from externally added base in order to give negligible change in pH, is known as buffer solution. In general, the solution resists the change in pH. Buffer solution does not mean that there does not occur a pH change at all. It implies the pH change occurs but in negligible amount. There are two types of buffer
(i) Acidic buffer: it is a mixture of weak acid and its salt with strong base.
(ii) Basic buffer: it is a mixture of weak base and its salt with strong acid.
Answer the following questions based on above passage:
pH of 0.01 M `(NH_4)^2SO_4` and 0.02 M `(NH_4)^+`, `pK_a((NH_4)^+)`=9.26 is

A

4.74 + log2

B

4.74 -log2

C

4.74+log1

D

9.26+ log1

Text Solution

Verified by Experts

The correct Answer is:
D
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