50℃时,下列各溶液中,离子的物质的量浓度关系正确的是 A.pH=4的醋酸中:c

题型:选择题

问题:

50℃时,下列各溶液中,离子的物质的量浓度关系正确的是

A.pH=4的醋酸中:c(H+)= 4.0molL-1

B.饱和小苏打溶液中:c(Na+)= c(HCO3

C.饱和食盐水中:c(Na+)+ c(H+)= c(Cl)+c(OH

D.pH=12的纯碱溶液中:c(OH)= 1.0×10-2 molL-1

考点:离子共存
题型:选择题

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A.90

B.100

C.112

D.128

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A.计划体系

B.决策体系

C.目标体系

D.营销体系

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B、增强涂层耐蚀性

C、具有一定的防锈能力

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