What are the H3 O^+ and OH^- concentrations of solutions that have the following

Question

What are the H3 O^+ and OH^- concentrations of solutions that have the following pH values? A. pH1 B. pH 13 C. pH 0 D. pH 1.24 E. pH 7.96

Explanation / Answer

A . pH 1 => -log[H+] = 1 => [H+] = 10^-1 M since Kw = [H+] [OH-] = 10^-14 => [OH-] = 10^-13 B. pH 13 -log[H+] = 13 => [H+] = 10^-13 M since Kw = [H+] [OH-] = 10^-14 => [OH-] = 10^-1 M C. pH = 0 => -log[H+] = 0 => [H+] = 1 M (highly acidic) since Kw = [H+] [OH-] = 10^-14 => [OH-] = 10^-14 M d . pH 1.24 => -log[H+] = 1.24 => [H+] = 5.75 * 10^-2 M since Kw = [H+] [OH-] = 10^-14 => [OH-] = 1.74 * 10^-13 M e. pH 7.96 => -log[H+] = 7.96 => [H+] = 1.09 * 10^-8 M since Kw = [H+] [OH-] = 10^-14 => [OH-] = 9.17 * 10^-6 M

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