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+dif 2n;q )yj72 zmq iagk *l5ppc1/eq b2s7wcmta. . mtnt/2o5.ikopdetween $NH_3$ 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. The baser+te3k c* 6joj in the forward and backward react+*rek3 6jcj toions 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.
| 
