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The [H^(+)] in 0.2 M solution of formic ...

The `[H^(+)]` in 0.2 M solution of formic acid is `6.4 xx 10^(-3)` mol `"litre"^(-1)`. To this solution formate is added so as to adjust the conc. of sodium formate to one mol per litre. What will be pH of this solution ? `K_(a)` for HCOOH is `2.4 xx 10^(-4)` and degree of dissociation of HCOONa is 0.75. : 2.32, 6.29, 4.19, 1.57

A

2.32

B

6.29

C

4.19

D

1.57

Text Solution

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The correct Answer is:
C
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