50. The ion product for liquid water, Kw, varies with temperature (T), as indicated by the change in pKw shown in the table above. The definition of neutrality is [H+] = [OH-]. Which of the following is the pH of water at neutrality at 50°C ?
(A) 6.35
(B) 6.64
(C) 7.00
(D) 7.40
(E) 13.28

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