First slide

PH scale, PH of strong acids and strong bases

Question

The [OH^–] of a solution is 10^–10. Its pH is

Easy

A

4
B

10
C

7
D

9

Solution

$[H^{+}] [{OH}^{-}] = K_{w} = 10^{- 14} [H^{+}] = 10^{- 14}$
P^H = 4

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