# Electrochemical Cells Question

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#1
Hi guys, i'm not sure how to do this question regarding electrochemical cells :

Predict the reaction that will occur when Cl2 and Br2 are added separately to a solution that contains both Cl- and Br-

Is the answer reduction for both?
0
7 years ago
#2
hope this helps op
http://lmgtfy.com/?q=electrochemical+cells
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#3
I dont understand the question, but i know the concepts..
0
7 years ago
#4
Cl2 & 2 electrons taken --> 2 Cl- Eo = +1.359 volts
2Br- --> Br2 & 2 electrons lost Eo = - 1.065 volts

combine both:
Cl2 & 2 Br- --> 2 Cl- & Br2 Eo reaction = + 0.294 volts
+ve sign shows the preferred, product- favored reaction.
0
6 years ago
#5
Hi, is it possible to determine % of Cu in an alloy using Electrochemical cells?
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6 years ago
#6
(Original post by Mohid Khan)
Hi, is it possible to determine % of Cu in an alloy using Electrochemical cells?
Yes.
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6 years ago
#7
(Original post by Borek)
Yes.
How?
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6 years ago
#8

Hint: electrodeposition of copper.
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6 years ago
#9
yeh i know the electrode will gain mass due to the copper sulphate BUT how will i determine the PERCENTAGE of Copper in an alloy????
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6 years ago
#10
Write the formula for the copper percentage in an alloy. It depends on two quantities. Think how you can measure them.
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6 years ago
#11
Mate, why are you looooooooooooooooonging it out
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6 years ago
#12
To force you to think and find the answer by yourself. If you came just for the answer, you have to look for someone else to help you.
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6 years ago
#13
(Original post by Borek)
To force you to think and find the answer by yourself. If you came just for the answer, you have to look for someone else to help you.
Mate i dont know the answer, i am trying to think , but i cant figure it out, plz understand
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6 years ago
#14
So please follow the hints you are given. Write the formula I asked you about. It is a definition, so you have seen it for sure.
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6 years ago
#15
is it something like this: http://answers.yahoo.com/question/in...0200357AAVjtaW
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6 years ago
#16
Write the most simple DEFINITION of percent fraction of one thing in the total.
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