Homework Help: Chem AP help!

Posted by Daya on Monday, March 12, 2012 at 4:52pm.

A zinc-copper battery is constructed as follows at 25°C:
Zn | Zn2+(0.15 M) || Cu2+(1.70 M) | Cu
The mass of each electrode is 150. g.
The cell potential when the cell is first attached is 1.13V

How long can this battery deliver a current of 5.00 A before it goes dead?

I tried using the method posted from a previous user, but it doesnt work!! i keep getting 24.6 hrs after using factor label. Maybe the Molarties play a part, but I dont know how...please help me!

Chem AP help! - DrBob222, Monday, March 12, 2012 at 5:02pm
Let's get on the same page. What Eo values are you using for Cu and Zn. Is that 1.13 v given in the problem or did you calculate that?
Chem AP help! - Daya, Monday, March 12, 2012 at 9:43pm
i've calculated it and its right (this is a webassign problem) so i know thats right...the masses were given
Chem AP help! - DrBob222, Monday, March 12, 2012 at 10:02pm
If I'm to help I need to know the Eo values you used. I don't want to go through this calculation using values from my book when you use values from some other book. Using my numbers I don't get 1.13 v; that's why I need the Eo values.
Chem AP help! - Daya, Tuesday, March 13, 2012 at 12:30am
ok ..so the Eo value for Zn is -0.763 and for Cu its +0.337

Answer this Question

Related Questions

Chem. help please - A zinc-copper battery is constructed as follows at 25 degree...
Chemistry - A zinc-copper battery is constructed as follows. Zn | Zn2+ (0.70 M...
Chemistry - A zinc-copper battery is constructed as follows at 25°C. Zn|Zn^2...
Chemistry -please help! - A zinc-copper battery is constructed as follows at 25&...
college chemistry - A zinc-copper battery is constructed as follows: Zn | Zn+2(0...
Chem Equation - In a lab expirement you add copper(II)nitrate to pure zinc. ...
chemistry - The voltage generated by the zinc concentration cell described by, ...
Chemistry - The voltage generated by the zinc concentration cell described by, ...
chem - Copper sulfate is a blue solid that is used as an algicide. Solutions of ...
Chemistry multiple choice - During today’s experiment we will produce ...

For Further Reading

First Name:
School Subject:
Answer: