用 HCl 中和 Na 2 CO 3 溶液分别至 pH=10.5 和 pH=7.0 时,溶液中各有哪些组分?其主要组分是什么? H 2 CO 3 的 Ka1= 4.2 × 10 -7 , Ka2=5.6 -11 。?其主要组分是什么? H 2 CO 3 的 K a1 = 4.2 × 10 -7 , K a2 =5.6 -11 。
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