Redox chemistry

Question

Calculate the Eo cell for the redox reaction shown below in volts:

3K(s)+Cr+3(aq)→3K+1(aq)+Cr(s)3

Eocell=Eocathode+Eoanod

Answer 1

RED: Cr³⁺ + 3e^- ⇒ Cr

OX: K ⇒ K⁺ + e^-

Go to a reduction potential table and look up the 1/2 reactions, if they are reversed to the reactions written, take the negative of the E₀

Add the voltages together for the two 1/2 reactions.

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