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 reaction kim;f hu7f17h nlt0;pbetwesg8ll*xviz8s6cf .t+nqg;c8 en $NH_3$ 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 hydrogen ion, whereas an acid donates it. T )flu s om9am,oy-;f;the base in the forward and backward;,o f;stm)y-uoaml9 f reactions are therefore the species which 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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