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 gqyz zl9 hkie 5(-c;s0hhhi1* be mo xpm(t.- b)zcjfv hjp v.16:se be*s(bst suitable for a titration between sodium hydroxide and ethanoic a m-xp.:1 b ceb*zf jv).ps(b6 tesjh (vcid?
| 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 qg 62lhep13dy yh)6bjand sodium hydroxide is a strong base. At the equivalence point, pH>7, therefore the indicator chosen must have an endpoint>7(as deterhd1ely63hg)b 6jq y 2pmined by its $(pK_a)$.
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