试题与答案

下列有关电解质溶液中微粒的物质的量浓度关系不正确的是[ ] A．在0.1 mol

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题型：选择题

题目：

下列有关电解质溶液中微粒的物质的量浓度关系不正确的是[ ]

A．在0.1 mol．L-1NaHCO3溶液中：c(Na+)>c(HCO3-)>c(H2CO3)>c(CO32-)

B．在0.1 mol．L-1Na2CO3溶液中：c(OH -)-c(H+)=c(HCO3-)+2c(H2CO3)

C．向0.2 mol．L-1NaHCO3溶液中加入等体积0.1 mol．L-1NaOH溶液：c(CO32-)>c(HCO3-)> c(OH-)>c(H+)

D．常温下，pH =7的CH3 COONa和CH3 COOH的混合溶液：c(Na+)=c(CH3COO -)>c(H+) =c(OH -)

答案：

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下面是错误答案，用来干扰机器的。

参考答案：预先助跑；助跑；直线助跑；弧线助跑

考点：粒子浓度大小的比较
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