分别在四杯100cm3水中加入5g乙二酸、甘油、季戊四醇、蔗糖形成四种溶液, 则这四种溶液的凝固点( )。A.都相同 B.加蔗糖的低 C.加乙二酸的低...

作者: tihaiku 人气: - 评论: 0
问题 分别在四杯100cm3水中加入5g乙二酸、甘油、季戊四醇、蔗糖形成四种溶液, 则这四种溶液的凝固点( )。
选项 A.都相同 B.加蔗糖的低 C.加乙二酸的低 D.无法判断
答案 C
解析 提示:根据稀溶液的依数性,水中加入这四种物质,溶液的凝固点降低,但凝固 点下降值,电解质乙二酸溶液要大于非电解质蔗糖溶液,因此乙二酸溶液 的凝固点最低。

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