Question

In: Chemistry

Like all equilibrium constants, the value of Kw depends on temperature. At body temperature (37C), Kw=2.4x10^-14....

Like all equilibrium constants, the value of Kw depends on temperature. At body temperature (37C), Kw=2.4x10^-14. What are the [H3O+] and the pH of pure water at the body temperature? Show all work.

Solutions

Expert Solution

H3O+ is nothing but H+ + H2O or we can say it is just H+ as water (a pure liquid) will not be counted.

ICE Table:

                     H2O            <==>        H+      +     OH-
Initial              1                                0               0

change           -                                +x              +x

equilibrium     1                                x                 x

K = [H+][OH-] / [H2O]
2.4 x 10-14 = x2
x =1.54 x 10-7 = [H+]

pH = -log[H+] = -log(1.54 x 10-7) = 6.81

queen_honey_blossom answered 6 months ago
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