Homework Help: chemistry

Posted by Anonymous on Tuesday, March 10, 2009 at 11:04pm.

I did an experiment where i put iron nail with zinc metal wrapped around it in agar solution.

the solution turned pink.
I have to find the
anode:

anode reaction:

cathode (remember, a metal can be an inactive electrode):

cathode reaction (there aren’t any metal ions present, so the metal does not get reduced. Something else does. What is it?) :

the notes in the () are notes my teacher wrote.

That means the anode is zinc. the cathode iron. The cathode reaction is oxygen because it's getting reduced. What is the anode reaction?

chemistry - DrBob222, Tuesday, March 10, 2009 at 11:11pm
From your description, the Zn is the anode and the reaction is
Zn ==> Zn^+2 + 2e

Why did the agar turn pink? Did you have an indicator in it?

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