First slide

Ionic product of water

Question

At certain temperature the K_w of D₂O is 10^–16M. Then the pD of pure D₂O at that temperature is

Moderate

A

7
B

16
C

8
D

6

Solution

$[D^{+}] = \sqrt{K_{w}} = \sqrt{10^{- 16}} = 10^{- 8}$
P^D = 8

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