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Agricultural drainage waters may contain selenium, which is harmful to waterfowl. Consider the following reaction: 3 Se + H0 HSeO; +3H +3e HSe- log(K)

Agricultural drainage waters may contain selenium, which is harmful to waterfowl. Consider the following reaction: 3 Se + H0 HSeO; +3H +3e HSe- log(K) = 18.3 Calculate the HSe to HSeO3 ratio if the En of the system is 250 mV and the pH is 7.

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