118. Задачка по химии №011 911

To determine potassium dichromate in the electrolyte, a 20 ml sample was placed in a 2.0 ml volumetric flask. After bringing the volume to the mark with water, 25 ml of the solution was titrated with coulometric electrogenerated iron (II) ions at a current of 0.8 V for 20 min. Determine the molar concentration of potassium dichromate.

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