摘要：草酸是二元弱酸.KHC2O4溶液呈酸性.对于0.1 mol/L KHC2O4.下列关系正确的是: A.c(K+)+c(H+)=c(HC2O4–)+c(OH–)+c(C2O42–) B.c(HC2O4–)+c(C2O42–)=0.1 mol/L C.c(K+)=c(H2C2O4)+c(HC2O4–)+c(C2O42–) D.c(C2O42–)<c(H2C2O4)

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