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]
The reversible reacti )vqrj 8iz/o8w)wmft/ 6*- xle c1wnbc lc(3dl0kul/ aon between $NH_3$ and $H_2SO_4$ is:
$NH_3 + H_2SO_4 \rightleftharpoons NH^+_4 + HSO_4^-$
Which compounds act as bases in the forward and backward reactions?
A. Base in forward reaction is $NH_3$ Base in backward reaction is $NH^+_4$
B. Base in forward reaction is $NH_3$ Base in backward reaction is $HSO_4^-$
C. Base in forward reaction is $H_2SO_4$ Base in backward reaction is $NH^+_4$
D. Base in forward reaction is $H_2SO_4$ Base in backward reaction is $HSO_4^-$
参考答案: B
本题详细解析:
A base accepts a hydrognk8l a;nyk+tkw 82,/3 tsnowven ion, whereas an acid donates it. The base in the forward and backward reactions are therefore the species wa;n3 wk8s8 / 2t+knny ,wtlkvohich gain hydrogen ions during the reaction:$NH_3 and HSO_4^-$ respectively.
This question is moderately difficult as the student must recall the definition of a base and identify specific examples of bases in a reaction equation.
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