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A 1.000 mL aliquot of a solution containing Cu 2 + and Ni 2 + is...

A 1.000 mL aliquot of a solution containing Cu 2 + and Ni 2 + is treated with 25.00 mL of a 0.05485 M EDTA solution. The solution is then back titrated with 0.02234 M Zn 2 + solution at a pH of 5. A volume of 21.46 mL of the Zn 2 + solution was needed to reach the xylenol orange end point. A 2.000 mL aliquot of the Cu 2 + and Ni 2 + solution is fed through an ion-exchange column that retains Ni 2 + . The Cu 2 + that passed through the column is treated with 25.00 mL of 0.05485 M EDTA . This solution required 15.70 mL of 0.02234 M Zn 2 + for back titration. The Ni 2 + extracted from the column was treated witn 25.00 mL of 0.05485 M EDTA .

How many milliliters of 0.02234 M Zn 2 + is required for the back titration of the Ni 2 + solution?

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queen_honey_blossom answered 2 years ago
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