11. 將0.01 莫耳的HCl 氣體完全溶入1 升的下列各水溶液中,何者的pH 值變化最小? (A) 0.01M CH3COOH. (B)含有0.01M CH3COOH 和0.01M CH3COONa. (C) 0.05M CH3COONa.
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