本题目来源于试卷: Mechanisms of Chemical Change F.1 Proton Transfer Reactions，类别为 IB化学
[问答题]
This question is about the weehzjm) iojn a- lr9391ayd00fwwx h*pc9 i94 tpk acid, carbonic acid $H_2CO_3(pK_{a1} = 6.35)$.
1. 1.Determine the pH of a $0.175\,mol\,dm^{-3}$ solution of carbonic acid.
2.State one assumption made in your answer to (a)(i).
Carbonic acid is a diprotic acid so can undergo two dissociations. The second dissociation has a $pK_{a2}$ of 10.33.
2. 1.State the equation for the second dissociation of carbonic acid.
2.Comment on the degree of dissociation for this second proton, based on the value of $pK_{a2}$.
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