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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))`

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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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Correct Answer - A
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