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]
Given the following indicators and their :fd/tdkt+ g6s behaviours, what wi /rp) f 1z2p(xh i0jtzhll be the correct colours of a solution of 1.0 M KOH tested with each i pt(z2/ifzj1p 0hrhx )ndicator?
| Indicator | pH range | Colour change (Acid- alkali) | | Methyl orange | 3.1- 4.4 | Red – Orange | | Bromocresol green |
3.8 - 5.4 | Yellow - Blue | | Phenolphthalein | 8.3 - 10.0 | Colourless - Pink |
A. Methyl orange is Red Bromocresol green is Yellow Phenolphthalein is Colourless
B. Methyl orange is Orange Bromocresol green is Blue Phenolphthalein is Pink
C. Methyl orange is Orange Bromocresol green is Blue Phenolphthalein is Colourless
D. Methyl orange is Orange Bromocresol green is Yellow Phenolphthalein is Pink
参考答案: B
本题详细解析:
A 1.0M solution of KOH would have a pH of 14. Methyl orange, b:tv n/b :rr1 kavsp.z1pg:/r jcchi(4romocresol green, and phenolphthalein would be orange, yellow, and green respectively at thg/ .az4c1(::r it1nhvrk/ j: s cbvrppis pH.
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