November 28, 2015

Homework Help: chemistry

Posted by Hannah on Thursday, May 12, 2011 at 4:54pm.

From the indicated voltages for the voltaic cell pictured, determine the standard electrode potential, EM3+/M, if the metal, M, is each of the following.

description on the image:

in the left beaker there is one Cr3+ and one Cr2+ on the right beaker there is 'M'3+
the left one is oxidation the right is reduction.

heres the given:

La, Ecell = -1.96 V

so i have to find the Voltage of La i got -1.54 but it was wrong. don't you just use the equation

-1.96 V= .424V(oxidation potential for the Cr2+... equation) + x

and solve for x??

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