(4/6)( H + ) +c ( H 2 CO 3 C .当 a=1/2 时,所得溶液中存在:c ( Na + )> c ( CO 3
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(4/6)( H + ) +c ( H 2 CO 3 C .当 a=1/2 时,所得溶液中存在:c ( Na + )> c ( CO 3
(4/6)( H + ) +c ( H 2 CO 3 C .当 a=1/2 时,所得溶液中存在:c ( Na + )> c ( CO 3
(4/6)( H + ) +c ( H 2 CO 3 C .当 a=1/2 时,所得溶液中存在:c ( Na + )> c ( CO 3
a=1/2 时,正好生成Na2CO3溶液,故 Na+ 》CO32-》OH - > HCO 3 - > H + 答案C正确