11. Consider the titration of 50.0 ml of 0.10 M acetic acid (Ka= 1.8x10⁻⁵) with 0.10 M NaOH. Calculate [H⁺] (in M) if 25.0 ml of NaOH is added?
(A)1.2x10⁻⁶
(B)3.8x10⁻⁶
(C)7.5x10⁻⁶
(D)1.8x10⁻⁵
(E)5.4x10⁻⁵

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