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 an x02-ig ;mnn8ead jx0xv z*mlg p/pr*5d their behaviours, wh fzaz(x v/89keat will be the correct colours of a solution of 1.0 M KOH tested with x/ke8fz(9va z each indicator?
| 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, bromocresol green,io8tr c 2kna5t9q3d*n and phenolphthalein would be orange, yellow, and green respectively at to9n5nt kdi3 *ctaq8r 2his pH.
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