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What is the maximum concentration of total ammonia nitrogen

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Uncharged ammonia [NH3(aq)] is toxic to fish at a concentration of 0.01 mg/L NH3-N. What is the maximum concentration (mg/L) of total ammonia nitrogen (the sum of the N concentrations in NH3 and NH4+) that can be in solution without causing toxicity at pH 7.0? At pH 9.0?

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The problem is about the determination of the maximum concentration of total ammonia nitrogen (TAN) in a solution at a given pH. Chemical equilibrium is the concept in which the solution was based. At neutral pH (7.0), the maximum TAN yielded a value below the maximum concentration. However, at a basic pH (9.0) the maximum TAN yielded a higher value than the maximum permissible concentration. Hence, a higher pH solution will be more toxic for fishes.

Reference no: EM131398424

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