试题与答案

(9分)完成以下小题: (1)已知NaHSO3溶液显酸性,则溶液中各离子浓度从大

题型:填空题

题目:

(9分)完成以下小题:

(1)已知NaHSO3溶液显酸性,则溶液中各离子浓度从大到小的顺序是                             

(2)25℃时,向pH=4的NaHSO4溶液中,逐滴加入pH=9的Ba(OH)2溶液至中性,则该过程的离子反应方程式                             ;已知25℃时BaSO4的Ksp=1.0×10-10,则以上过程中       沉淀生成(填“有” 或“无”)。

(3)某温度下,0.1 mol·L-1Na2CO3溶液中c(Na+)∕c(CO32-)=20/9,其原因是                                     ;现往Na2CO3溶液中通入一定量的CO2后,c(Na+)∕c(CO32-)=5∕2,其原因是                               。(用离子方程式和必要的文字说明)

答案:

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8()

A.putting

B.taking

C.growing

D.letting

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