题目

体积相同、pH相同的HCl溶液和CH3COOH溶液，与NaOH溶液中和，两者消耗NaOH的物质的量（ ） A．相同 B．中和HCl的多 C．中和CH3COOH的多  D．无法比较 答案：【考点】弱电解质在水溶液中的电离平衡． 【分析】盐酸和醋酸都是一元酸，pH相同的HCl溶液和CH3COOH溶液，酸是弱电解质，氯化氢是强电解质，所以C（HCl）＜C（CH3COOH），等体积的两种溶液，所以哪种溶液中含有溶质的物质的量多，其消耗的氢氧化钠的物质的量就多，据此分析解答． 【解答】解：盐按要求完成下列句子。【1】I couldn’t dress myself when I was young. (改为同义句)I ________ _______ _______dress myself when I was young.【2】They came here five years ago. (用for five years改写句子)They ________ _______ _______for five years.【3】The storm damaged the houses in the village. (改为被动语态)The houses in the village ________ _______by the storm.【4】我的生活充满欢乐。（根据汉语提示完成句子）My life ________ _______ _______happiness.【5】how, he, lucky, a, is, boy, who, doesn’t, he, know, is（连词成句）________________________.