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Topic: Oxidation and Reduction Reactions of Halogens  (Read 23457 times)

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amanda8991

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Oxidation and Reduction Reactions of Halogens
« on: February 27, 2006, 11:50:28 PM »
What would happen if chlorine water was added to an aqueous solution of sodium chloride?

What would happen if chlorine water was added to an aqueous solution of sodium bromide?

Offline mike

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Re:Oxidation and Reduction Reactions of Halogens
« Reply #1 on: February 28, 2006, 12:22:42 AM »
There is no science without fancy, and no art without facts.

amanda8991

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Re:Oxidation and Reduction Reactions of Halogens
« Reply #2 on: February 28, 2006, 12:28:02 AM »
Are you saying that Cl and Br would be reduced?

Offline mike

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Re:Oxidation and Reduction Reactions of Halogens
« Reply #3 on: February 28, 2006, 12:59:07 AM »
Well I am guessing that perhaps the Br- would be oxidized to Br2 while the Cl2 would be reduced to Cl-

I don't know what would happen if you bubble Cl2 through NaCl, I don't see why anything would happen.

What do you think?
There is no science without fancy, and no art without facts.

amanda8991

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Re:Oxidation and Reduction Reactions of Halogens
« Reply #4 on: February 28, 2006, 01:16:26 AM »
Is the chlorine water just an aqueous solution of cl?

Cl-(aq) +NaCl (aq) ---> NaCl2


That cant be right I guess because it doesn't seem like either of them are being oxidized ore reduced.

Offline mike

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Re:Oxidation and Reduction Reactions of Halogens
« Reply #5 on: February 28, 2006, 01:17:54 AM »
I think you must assume that the chlorine water is a solution of Cl2.
There is no science without fancy, and no art without facts.

amanda8991

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Re:Oxidation and Reduction Reactions of Halogens
« Reply #6 on: February 28, 2006, 01:23:06 AM »
So the equation would be...

Cl2 (aq) + NaCl(aq) ---->

How would you write the other side of that? Would it be NaCl and then you just balance it?

Offline AWK

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Re:Oxidation and Reduction Reactions of Halogens
« Reply #7 on: February 28, 2006, 01:33:26 AM »
Chlorine water is partailly some hydrate of water and a mixture of HCl and HOCl
Cl2 + H2O = HCl + HOCl

in the case of NaBr
2NaBr + Cl2 = 2NaCl + Br2
Br2 can react with exces of Cle
Br2 + Cl2 = 2 BrCl and colour of bromine water disappears.
« Last Edit: February 28, 2006, 01:33:51 AM by AWK »
AWK

amanda8991

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Re:Oxidation and Reduction Reactions of Halogens
« Reply #8 on: February 28, 2006, 01:41:29 AM »
Chlorine water is partailly some hydrate of water and a mixture of HCl and HOCl
Cl2 + H2O = HCl + HOCl

in the case of NaBr
2NaBr + Cl2 = 2NaCl + Br2
Br2 can react with exces of Cle
Br2 + Cl2 = 2 BrCl and colour of bromine water disappears.

If you were to add that chlorine water to NaCl would the equation be written like this:

HCl+ HClO +NaCl----> ?

Is it possible to have three reactants on one side?

Offline AWK

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Re:Oxidation and Reduction Reactions of Halogens
« Reply #9 on: February 28, 2006, 04:14:19 AM »
Reactants should react - in this case no reaction is observed
AWK

Offline peacefulltortoise

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Re:Oxidation and Reduction Reactions of Halogens
« Reply #10 on: February 28, 2006, 05:06:07 AM »
Please describe deeply what happen when pour Clorine solution to NaBr and NaI solutions. Is there any thing different in two cases?

Offline Borek

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Re:Oxidation and Reduction Reactions of Halogens
« Reply #11 on: February 28, 2006, 05:12:50 AM »
Please describe deeply what happen when pour Clorine solution to NaBr and NaI solutions. Is there any thing different in two cases?

Yes. Chlorine doesn't react with chlorides, but reacts with bromides and iodides, replacing them in the salts.
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Offline Borek

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Re:Oxidation and Reduction Reactions of Halogens
« Reply #12 on: February 28, 2006, 05:18:57 AM »
Is it possible to have three reactants on one side?

As much as you wish ;)

this is so called Blakley equation:

88H2 + 15Ca(CN)2 + 6NaAlF4 + 10FeSO4 + 3MgSiO3 + 6KI + 2H3PO4 + 6PbCrO4 + 12BrCl + 3CF2Cl2 + 20SO2 -> 6PbBr2 + 6CrCl3 + 3MgCO3 + 6KAl(OH)4 + 10Fe(SCN)3 + 2PI3 + 3Na2SiO3 + 15CaF2 + 79H2O

and this one was published by Stout:

10(Cr(N2H4CO)6)4(Cr(CN)6)3 + 1176KMnO4 + 1399H2SO4 -> 35K2Cr2O7 + 1176MnSO4 + 420CO2 + 660KNO3 + 223K2SO4 + 1879H2O

EBAS rulez :)
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Offline peacefulltortoise

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Re:Oxidation and Reduction Reactions of Halogens
« Reply #13 on: March 05, 2006, 06:01:41 AM »
Yes. Chlorine doesn't react with chlorides, but reacts with bromides and iodides, replacing them in the salts.
I see, but what can we see differences beetween Cl2 + NaBr --> NaCl + Br2 and Cl2 + NaI --> NaCl + I2 ? I guess the solutions in two case are the same color.

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Re:Oxidation and Reduction Reactions of Halogens
« Reply #14 on: March 05, 2006, 06:35:27 AM »
I see, but what can we see differences beetween Cl2 + NaBr --> NaCl + Br2 and Cl2 + NaI --> NaCl + I2 ? I guess the solutions in two case are the same color.

What is color of free bromine, what is color of free iodine?
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