## Concentration cells

$\Delta G^{\circ} = -nFE_{cell}^{\circ}$

Chew 2H
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### Concentration cells

For concentration cells with different concentration, why does the product has to have lesser concentration than the reactant when we write the overall reactions?

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### Re: Concentration cells

That is because the product will be gaining an increase in concentration as the reaction goes on because the anode will begin to consume the electrode and produce the Concentration ion while the cathode will be gaining mass to the electrode and consuming the Concentration ion. So in order for the reaction to proceed forward, the Concentration will go from high to low (reactants to products, it is favorable) and that must mean the Cathode, which consumes the Concentration ion, has the higher molarity.

melissa carey 1f
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