[题目]一杯20℃的NaNO3溶液.能证明它是饱和溶液的是( )A．蒸发10g水有NaNO3晶体析出B．降低10℃时.有NaNO3晶体析出C．加入10gNANO3晶体.仍有NaNO3晶体未溶解D．在该温度下.加入少许NANO3晶体.晶体质量不减少题目和参考答案——青夏教育精英家教网—

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【题目】一杯20℃的NaNO3溶液，能证明它是饱和溶液的是（）

A．蒸发10g水有NaNO3晶体析出

B．降低10℃时，有NaNO3晶体析出

C．加入10gNANO3晶体，仍有NaNO3晶体未溶解

D．在该温度下，加入少许NANO3晶体，晶体质量不减少

【答案】D

【解析】判断溶液是否饱和的依据是：看在一定温度下，溶剂不变时，能不能再继续溶解该物质．

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