25℃时,下列各组离子在指定溶液中一定能大量共存的是( )。A.pH=1的溶液中:Na+、K+、MnO4-、C023- B.由水电离的c(H+)=lxl...

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问题 25℃时,下列各组离子在指定溶液中一定能大量共存的是( )。
选项 A.pH=1的溶液中:Na+、K+、MnO4-、C023- B.由水电离的c(H+)=lxl0-13 mol/L的溶液中:Mg2+、Cu2+、S042-、N0-3; C.0.1 mol/L NH4HCO3溶液中:K+、Na+、N03-、Cl一 D.O.1 mol/L FeCl3溶液中:Fe2+、NH4+、SCN-,SO42-
答案 C
解析

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