含有等物质的量的CH3COOH和CH3COONa的混合溶液中，下列说法正确的是
| A．c(CH3COOH) + c(H+ )＜c(OH－) + c(CH3COO－) |
| B．c(H+ ) + c(CH3COOH) = c(OH－) + c(CH3COO－) |
| C．c(Na+)＞c(CH3COO－)＞c(OH－)＞c(H+) |
| D．c(Na+) = c(CH3COOH) + c(CH3COO－) |
含有等物质的量的CH3COOH和CH3COONa的混合溶液中，下列说法正确的是
| A．c(CH3COOH) + c(H+ )＜c(OH－) + c(CH3COO－) |
| B．c(H+ ) + c(CH3COOH) = c(OH－) + c(CH3COO－) |
| C．c(Na+)＞c(CH3COO－)＞c(OH－)＞c(H+) |
| D．c(Na+) = c(CH3COOH) + c(CH3COO－) |
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