试题与答案

如图1是甲、乙两种物质的溶解度曲线,请回答下列问题. (1)______℃时,甲

题型:填空题

题目:

如图1是甲、乙两种物质的溶解度曲线,请回答下列问题.

(1)______℃时,甲、乙两种物质的溶解度相等.

(2)将乙的饱和溶液变成不饱和溶液的方法是______.(任写一种)

(3)t2℃时,分别将甲、乙两种物质的饱和溶液降温到t1℃,有晶体析出的是______,此时甲溶液的溶质质量分数______(填“大于”、“等于”或“小于”)乙溶液的溶质质量分数.

(4)小明同学用甲物质进行如图2实验:

①实验过程中,所得溶液溶质质量分数相同的是______(填字母序号).

②向B中溶液再加入60g甲固体的过程中,发现先固体全部溶解,一段时间后又有部分固体析出.你认为“全部溶解”的原因是______.

答案:

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答案:A

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