In this reaction chromium get reduced and tin oxidised. The opposit is not possible.

E = Eox- E red

Use for E the Nernst equation and the concentration of both ions.

The value should be positive.

You mean I have to calculatw E(Cr

^{3+}/

^{2+} us8ng the nersy equation??

And do the same thing for Tin?

Because using the standard potential I have: -0.40 + 0.14 = negqtive value

Using the nernst equation will be ok?

Thanks v)