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If 50 ml of 0.2 M KOH is added to 40 ml ...

If 50 ml of 0.2 M KOH is added to 40 ml of 0.5 M HCOOH, the pH of the resulting solution is `(K_(a) = 1.8 xx 10^(-4))`

A

3.4

B

7.5

C

5.6

D

3.75

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