Question

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?

Answer 1

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?

Answer 2

the phenolphthalein made the solution turn pink. It is only an indicator if the solution is acidic or basic. If it turns pink, it is acidic. If it turns colorless or pale, it is closer to being a basic property.

Answer 3

Phenolphthalein actually turns pink when it comes in contact with basic conditions - it is clear in acidic and neutral conditions