What is the pH of a 0.025 M solution of KOH?

(A) 1.60

(B) 3.69

(C) 10.31

(D) 12.40

### 1 Answer | Add Yours

`KOH rarr (K^+) +(OH^-)`

`P^OH = -log [OH^-]= -log[0.025] = 1.6`

To find` P^H ` we need to use the equation;

`P^Kw = P^H +P^(OH)`

Assuming that the temperature is 25 C;

`14= P^H +1.6`

`P^H = 14 - 1.6 =12.4`

*So the `P^H` of the solution is 12.4.*

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