试题与答案

为测定某稀盐酸溶液溶质的质量分数，取100g该溶液于烧杯中，向烧杯中滴入16%的

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题型：计算题

题目：

为测定某稀盐酸溶液溶质的质量分数，取100g该溶液于烧杯中，向烧杯中滴入16%的NaOH溶液，用pH计测得滴入NaOH溶液质量与pH的关系如右图所示。

（1）在a点时，烧杯中溶液的溶质是          ，此时向溶液中滴入紫色石蕊试液，溶液呈    色。

（2）通过计算求盐酸溶液溶质的质量分数。

（3）若改用16%的氢氧化钾溶液来测定盐酸溶质的质量分数，当滴入KOH溶液的质量为100g时，溶液的pH    7（填“大于”、“小于”或“等于”）。

答案：

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参考答案：⑥启动0809进行转换

考点：中和反应及在实际中的应用酸的性质碱的性质
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