本题目来源于试卷: Mechanisms of Chemical Change F.1 Proton Transfer Reactions，类别为 IB化学
[单选题]
When powdered calcium cocge,f cjf* 9lls,( *: fd)haa2/mq d oxide is added ievx gs8 ()u)dho+o 8m to dilute hydrochloric acid in a conical flask, the p ( )8vmod h)i8eg+ox usroducts are water, positive calcium ions and negative chloride ions.
Which species is the conjugate base of hydrochloric acid in this reaction?
A. Calcium oxide
B. Water
C. Calcium ion
D. Chloride ion
参考答案: D
本题详细解析:
The conjugate base of HCl is the compound produced when a hydrogen ion is remove2sdl7qeo 2 6k7j n1fncd. The conkl12 oc2njq67sfde7 njugate base is therefore the chloride ion,$Cl^-$.
This question is hard as the student must link the names of chemicals to their formula and identify a conjugate base without the aid of an explicit reaction equation.
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