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We all know that the concentration of H3O+ in pure water is [h3o+] = 10^(-7) M.rnBut how it was calculted? How can we say that the concentration of H3O+ in pure water is [h3o+] = 10^(-7) M???
Accepted Answer
The concentration of H3O+ in pure water is [H3O+] = 10^(-7) M because the autoionization of water constant, Kw, is 10^(-14). Kw is the product of the concentrations of H3O+ and OH- ions in pure water, and since the concentration of OH- ions is also 10^(-7) M, the concentration of H3O+ ions must also be 10^(-7) M in order to satisfy the equation Kw = [H3O+][OH-] = 10^(-14).
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