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 most suitable for a t 70gvumm-;d cb57zypt itration be xsxzz85w vm -y/t6iuwt b8t(0tween sodium hydroxide and ethanoic acid 5/-8 z8z6ix0y vwt wx(smttub?
| 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 i re ng lcnc19/;jug78 xobn))sodium hydroxide is a strong base. At the equivalenc9i) xg 17ncbec;n/jrguo)n 8l e point, pH>7, therefore the indicator chosen must have an endpoint>7(as determined by its $(pK_a)$.
| 
