22. When determining iron in a sample of wastewater with a volume of 200.0 ml, it was oxidized to Fe (III), precipitated with ammonia, the precipitate was separated from the solution, and after dissolving the precipitate in hydrochloric acid, iron was titrated, using 5.14 ml of 0.0050 M EDTA solution. Calculate the total concentration of iron in water (mg/l). Mol. mass: (Fe) 55.85.
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