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1.A Cu/Cu2+ concentration cell (E∘=0.34V) has a voltage of 0.24 V at 25 ∘C. The concentration...

1.A Cu/Cu2+ concentration cell (E∘=0.34V) has a voltage of 0.24 V at 25 ∘C. The concentration of Cu2+ in the cathode is 1.4×10−3 molL−1.

What is the concentration of Cu2+ in anode?

Express your answer using two significant figures.

2. The following reaction is spontaneous as written when the components are in their standard states:

3 Zn(s) +2 Cr3+(aq) →3 Zn2+(aq) +2 Cr(s)

If the [Zn2+] is 3 molL−1, determine the value of [Cr3+] below which the reaction will be spontaneous in the opposite direction.

Express your answer to two significant figures.

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