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In pure water at 298 K, the hydronium ion concentration is
A1.0 x 10^-1 M
B1.0 x 10^-14 M
C1.0 x 10^-10 M
D1.0 x 10^-7 M
Answer & Solution
Correct answer: D. 1.0 x 10^-7 M
Pure water self-ionises equally, giving [H3O+] = [OH-] = 1.0 x 10^-7 M at 298 K.
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