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]
Which indicator woul 9x ,tfkq*eos0m4l)9,wsqbw g j5gqov z)k; 0xkm-km(d be most suitable for a titration between sodium hydroxide and ethanoic aci mv q;jkx( gk-z05)ok md?
| Indicator | pKa | | Methyl orange | 3.7 | | Bromocresol green | 4.7 | | Bromothymol blue | 7.0 | | Phenolphthalein | 9.6 |
A. Methyl orange
B. Bromocresol green
C. Bromothymol blue
D. Phenolphthalein
参考答案: D
本题详细解析:
Ethanoic acid is a weak acid and szhhj-r l6)9pi(ka,j oao 3d 4wodium hydroxide is a strong base. At the equivalence point, pH>7, therefore the indicator chosen must have an endpoint>7(as dik,9 (w)4 jah3oa 6do-rlphjzetermined by its $(pK_a)$.
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