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13问答网 > 使不饱和溶液变为饱和溶液，最可靠的方法是（　　）A．升高温度B．加入溶质C．降低温度D．倒出一部分溶

使不饱和溶液变为饱和溶液，最可靠的方法是（　　）A．升高温度B．加入溶质C．降低温度D．倒出一部分溶

2025-03-16 04:37:56

推荐回答（1个）

回答1：

A、对于溶解随温度升高而增大的物质，升高温度会使不饱和溶液仍不饱和；对于溶解度随温度升高而减小的物质，升高温度可使不饱和溶液变成饱和溶液；故选项不一定可行．
B、向不饱和溶液中增加溶质，不饱和溶液继续溶解溶质而变成饱和溶液，故选项一定可行．
C、对于溶解随温度升高而增大的物质，降低温度，会使不饱和溶液变成饱和溶液；对于溶解度随温度降低而增大的物质，降低温度不饱和溶液仍不饱和；故选项不一定可行．
D、由于溶液具有均一性，倒出一部分溶液后溶液仍为不饱和溶液，故选项一定不行．
故选B．

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