123. Задачка по химии №012 377

7. For analysis, 20.0 ml of waste water containing iron compounds was taken, oxidized to iron (III) and precipitated in the form of hydroxide. The washed precipitate was dissolved in HCl and titrated with 4.05 ml of 0.0505 M EDTA solution. Calculate the mass and molar concentrations of iron in wastewater.

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