Question

A 1.000-mL aliquot of a solution containing Cu and Ni2 is treated with 25.00 mL of a 0.05182 MEDTA solution. The solution is then back titrated with 0.02198 M Zn2 solution at a pH of 5. A volume of 21.82 mL of the Zn2 solution was needed to reach the xylenol orange end point. A 2.000-mL aliquot of the Cu and Ni2 solution is fed through an ion-exchange column that retains Ni2. The Cu2 that passed through the column is treated with 25.00 mL 0.05182 M EDTA. This solution required 15.52 mL of 0.02198 M Zn2+ for back titration. The Ni2 extracted from the column was treated witn 25.00 mL of 0.05182 M EDTA. How many milliliters of 0.02198 M Zn2 is required for the back titration of the Ni2 solution? Number 35.70 mL There is a hint available! View the hint by clicking on the divider bar again to hide the hint. Close bottom divider bar , Click on the