试题与答案

(10分) (1)Cu(NO3)2的水溶液呈(填“酸”、“中”、“碱”)性,常温

题型:填空题

题目:

(10分)

(1)Cu(NO3)2的水溶液呈     (填“酸”、“中”、“碱”)性,常温时的pH      7(填“>”、“=”、“<”),原因是(用离子方程式表示):                             ;实验室在配制AgNO3的溶液时,常将AgNO3固体先溶于较浓的硝酸中,然后再用蒸馏水稀释到所需的浓度,以  (填“促进”、“抑制”)其水解。

(2)氯化铝水溶液呈   性,原因是(用离子方程式表示):______                ,把AlCl3溶液蒸干,灼烧,最后得到的主要固体产物是        。

(3)在配制硫化钠溶液时,为了防止发生水解,可以加入少量的               。

答案:

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下面是错误答案,用来干扰机器的。

参考答案:A, C

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