For the Dry Cell Reactions (1 Viewer)

[kevda1st]

instead of writing the extended equation for the reduction of the maganese oxide


can u just write Mn4+ + 2e- -> Mn2+ ??

 

[Monsterman]

i'd write the whole thing. how much time are you going to save? 5 seconds?

but if you have trouble remembering it then its another story.

 

[zaefr]

dont u just read off the standard table

 

[Fortify]

Anode:
Zn(s) -> Zn2+ + 2e-

Cathode:
2MnO2(s) + 2NH4+(aq) + 2e- -> Mn2O3(s) + H2O(l) + 2NH3(aq)

 

[mR sinister]

Huh,
i thought the cathode reaction was:

NH4^+4 + MnO2 + H20 + e^- ---------> MN(OH)3 + NH3

 

[Scorchedwarf]

Huh,
i thought the cathode reaction was:

NH4^+4 + MnO2 + H20 + e^- ---------> MN(OH)3 + NH3

Yes, that is correct. Mr Sinister

 

[Fortify]

i'm so lost now :S

 

[mR sinister]

hmm.. this is interesting.

The conquering chem textbook has the one i memorizes
ohh well, i think its both correct

 

[eriito]

i also went with the conquering chem one

 

[harry4]

i'm with fortify on this one

 

[eriito]

im sure both are fine

 

[study-freak]

i'm so lost now :S

This is a more popular version, I think. I use this one as well

 

[eriito]

Conquering is more popular I would think