此题的大意是：向0.1M的醋酸中滴加0.5M的氢氧化钠,当醋酸有60％被中和后,溶液的PH值是多少?（醋酸的平衡常数（Ka） 是 1.8 x 10 ^-5）
我只能做个大概的译文,不一定全对,高中化学不敢解答了.
A 0.1 M solution of acetic acid is titrated with 0.05M solut
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