Question
Question: At 90<sup>0</sup> C, pure water has [H<sub>3</sub>O<sup>+</sup>] = 10<sup>–6</sup>mol L<sup>–1</sup>...
At 900 C, pure water has [H3O+] = 10–6mol L–1. What is the value of Kw at 900C –
A
10–6
B
10–12
C
10–14
D
10–8
Answer
10–12
Explanation
Solution
For pure water, [H3O+] = [OH–]
Hence Kw = 10–12.