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Q.

The pH of the solution containing 50mL  each of 0.1M sodium acetate and 0.01M  acetic  acid  is:
         (Given: pKa of acetic acid is 4.57)
 

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a

 3.57

b

5.57

c

4.57

d

9.43

answer is B.

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Detailed Solution

pH=pka+log10⁡[ salt ][ Acid ]pH=4.57+log10⁡NsVsNAVApH=4.57+log10⁡0.1×500.01×50pH=4.57+log10101pH=4.57+1pH=5.57

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