Asked by Jake
If a piece of copper metal is dipped into a solution containing Cr3+ ions, what will happen? Explain with Ev values
Answers
Answered by
DrBob222
Nothing happens.
Cr^3+ + 3e ==> -0.74v
Cu ==> Cu^2+ + 2e -0.337
--------------------
2Cr^3+ + 3Cu ==> 3Cu^2+ + 2Cr E = -1.077v
The voltage is negative, hence the reaction, as written, will not occur. It will occur in the reverse direction.
Cr^3+ + 3e ==> -0.74v
Cu ==> Cu^2+ + 2e -0.337
--------------------
2Cr^3+ + 3Cu ==> 3Cu^2+ + 2Cr E = -1.077v
The voltage is negative, hence the reaction, as written, will not occur. It will occur in the reverse direction.
Answered by
Jessica
DrBob... Could you explain how you got negative...I thought E = reduced - oxidized E = 0.34 V - (-0.74 V) = 1.08 V
Answered by
DAVID
YOU JUST HAVE TO FOLLOW THE RULES & ABIDE WITH IT
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