Equilibrium Question 421

Question: A buffer solution contains 6.4×10−5 of acetic acid and 0.1M of sodium acetate. What will be its pH , if pKa of acetic acid is 4.75 [MP PMT 1996]

Options:

A) 4.00

B) 4.75

C) 5.00

D) 5.25

Show Answer

Answer:

Correct Answer: B

Solution:

pH=pKa+log[ Salt ][ Acid ] ; pH=4.75+log0.10.1

pH=4.75+log1 ; pH=4.75

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