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 would be kb24x dfd .(ti+zlrh)most suitable for a titration between sodium 7hecnxbk- u+(hydroxide and e c eku+nx 7(hb-thanoic acid?
| 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 sodium hydroxide is a strong base. At the,n1dj )t8u2pi8 ct deu equivalence point, pH>7, therefore the indicator chosen must have an endpoint>7(as dt8udn2i p,1u8c)jte d etermined by its $(pK_a)$.
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