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20 mL of 0.1 M acetic acid is mixed with...

20 mL of 0.1 M acetic acid is mixed with 50 mL of potassium acetate. `K_(a)` of acetic acid = `1.8 xx 10^(-5)` at `27^(circ)C`. Calculate concentration of potassium acetate if pH of the mixture is 4.8.

A

0.1 M

B

0.04 M

C

0.4 M

D

0.02 M

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The correct Answer is:
B
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