把0.02mol/LCH3COOH溶液和0.01mol/LNaOH溶液等体积混合,则混合溶液中微粒浓度关系正确的是(  ) A.c(CH3COO-)>c(Na+) B.c(CH3COOH)>c(CH3COO-) C.c(H+)=c(CH3C

问题描述:

把0.02mol/LCH3COOH溶液和0.01mol/LNaOH溶液等体积混合,则混合溶液中微粒浓度关系正确的是(  )
A. c(CH3COO-)>c(Na+
B. c(CH3COOH)>c(CH3COO-
C. c(H+)=c(CH3COO-)-c(CH3COOH)
D. c(CH3COOH)+c(CH3COO-)=0.02mol/L

A、因混合后为0.05mol/LCH3COOH溶液和0.05mol/LCH3COONa溶液,该溶液显酸性,c(H+)>c(OH-),由电荷守恒关系可得c(H+)+c(Na+)=c(CH3COOH-)+c(OH-),则c(CH3COO-)>c(Na+),故A正确;B、混合后为0.05...