Tuesday
September 2, 2014

Homework Help: Chemistry

Posted by Katherine on Thursday, June 7, 2012 at 7:21pm.

The voltage generated by the zinc concentration cell described by,
Zn(s)|Zn2+ (aq, 0.100 M)||Zn2+ (aq, ____ M)|Zn(s)
is 24.0 mV at 25 °C. Calculate the concentration of the Zn2 (aq) ion at the cathode.

Hi, I posted this question awhile back but I think it got drowned out so I didn't want to comment on it again for fear that it'd go unseen.
DrBob told me the value should be above 0.1 M.. I tried again and I was wondering if this is correct:

0.024 = (8.314*298 K)/(2*96485)
0.024 = 0.012839 * ln[x/0.1]
x = 0.648 M?

thanks ahead of time!

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