试题与答案

如图所示是氢氧化钠的溶解度曲线,请回答下列问题: (1)t℃时氢氧化钠饱和溶液

题型:填空题

题目:

如图所示是氢氧化钠的溶解度曲线,请回答下列问题:

(1)t℃时氢氧化钠饱和溶液的溶质质量分数是                        

(2)室温为20℃时,某同学向100g20℃的水中加入150g氢氧化钠,发现氢氧化钠全部溶解,过一段时间后又有部分氢氧化钠晶体析出,请你解释出现这种现象的原因是                                                                                     

答案:

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参考答案:A

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