試題詳解

26. At 25℃, 10 volumes of a strong acid solution of pH = m is mixed with 1 volume of a strong alkali solution of pH = n and the resulting solution is neutral. What is the relationship between the pH of the strong acid and the pH of the strong alkali before mixing?
(A)m +n= 15
(B) m +n=13
(C)m+n=11
(D)m +n=10
(E) m +n=9