chemical doubts , thx for your help very much

2007-03-06 9:31 pm
1chlorine water react with KBR forming bromine and yellow solution appears .
however, why chlorine doesnt react with water to form HCL AND HOCL whereas only reactewith KBR.

2iodine is soluble in kI forming potassium triiodide .the reaction is not reversible but why adding 1,1,1-trichloroethane ,iodine will dissolve in 1,1,1-trichloroethane and violet colour appears.(should be no iodine as all iodine reacte with kI to form potassium triiodide)
更新1:

i remain unclear ,just a little bit i get

回答 (1)

2007-03-07 1:02 am
✔ 最佳答案
可唔可以用中文?
1.其實呢d好似都可以叫displacement reaction
HCl同Cl2可能有react都唔知.....因為置換左Cl2出來
Cl2溶於水會有呢個反應....Cl2+H2O< - > HCl+HOCl
所以無反應...

2.因為I2+I- -> I3-係reversible reaction(唔係not reversible......如果係....點解唔見有KI3出現係書中?)
如果我咁講....你都明點解~


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