5. 200.0 ml of a solution containing 2.3500 g of technical copper sulphate was passed through a column with a cation exchanger in the H - form. 47.50 ml of a 0.0920 M KOH solution was used to neutralize the acid in each portion of the filtrate, 50.00 ml each. Determine the mass fraction of copper in the dissolved sample of copper sulfate.

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