Chemistry Practice Problems Ka and Kb Practice Problems Solution: Given that the [H3O+] of pure water is 7.24 × 10–7...

Solution: Given that the [H3O+] of pure water is 7.24 × 10–7 M at 100 °C, determine pKw of pure water at this temperature.A. 6.14 B. 12.3 C. 7.24 D. 14.0 E. 15.2

Problem

Given that the [H3O+] of pure water is 7.24 × 10–7 M at 100 °C, determine pKw of pure water at this temperature.

A. 6.14 

B. 12.3 

C. 7.24 

D. 14.0 

E. 15.2

Solution

We’re being asked to determine the value of pKw for pure water  given that the [H3O+] is 7.24 × 10–7 M at 100 °C


Recall that Kw is the autoionization constant of water, and is given by:


Kw=H+OH-


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