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Using the equation deltaG=-nfE(naught), if E(naught) is calculated using E(cathode)-E(anode), and E anode is bigger, this means that the total cell potential will be negative. Since negative times negative is positive, delta G is positive, which tells us that the forward reaction is not favored, but rather the reverse.
For nonstandard cell potentials, looking at the proportions of products and reactants when calculating Q can also help you determine which direction the reaction favors. For example, if Q is a large number (so there would be a lot of product in proportion to reactants), it would be a product favored system. If Q is a small number (so there would be a lot of reactant), it would be a reactant favored system.
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