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AL Chem Paper II -Kc
2009-04-19 3:49 am
Part (iii) 唔識，請解釋！（用中文解答）
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回答 (2)
2009-04-19 6:55 am
✔ 最佳答案
(ii)(I) [I2(aq)] = 1.68/130 = 0.0129 mol dm-3(ii)(II) [I3-(aq)] = 0.722 mol dm-3
(iii)
在水溶液中，部份 I-(aq) 與 I2(aq) 反應，結合成 I3-(aq)。
[I-(aq)] + [I3-(aq)] = 0.810 mol dm-3
[I-(aq)] + 0.722 = 0.810
[I-(aq)] = 0.088 mol dm-3
Kc
= [I3-(aq)]/[I2(aq)][I-(aq)]
= (0.722)/(0.0129)(0.088)
= 636 (mol dm-3)-1
=
2009-04-20 5:52 am
(i) The safety precaution is open the cock of funnel after shaking for some seconds to release the pressure. ( vapour of chloroform)
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原文連結 [永久失效]:
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