# Chemistry

Hi I need help with another balancing oxidation-reduction reaction:

Cu(s) + Ag^1+(aq) → Cu^2+(aq) + Ag(s)

My work:

Cu (s) --> Cu^2+ (aq) + 2e-

2 [1e +Ag^1+ (aq) --> Ag(s)]

Cu(s) + 2 Ag(aq) --> Cu (aq) + 2 Ag (s)

Is this right?

And I need help with this one...

Zn(s) + H2SO4(aq) → ZnSO4(aq) + H2(g)

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1. Very good except you omitted a charge on the Ag, left side. You had it on the preceding step; you just didn't carry it forward.
Cu(s) + 2Ag^+(aq) ==> etc.

The second one is balanced as is, isn't it.

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