A 1.000-mL aliquot of a solution containing Cu2 and Ni2 is treated with 25.00 mL of...

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A 1.000-mL aliquot of a solution containing Cu2 and Ni2 istreated with 25.00 mL of a 0.05832 M EDTA solution. The solution isthen back titrated with 0.02380 M Zn2 solution at a pH of 5. Avolume of 18.49 mL of the Zn2 solution was needed to reach thexylenol orange end point. A 2.000-mL aliquot of the Cu2 and Ni2solution is fed through an ion-exchange column that retains Ni2 .The Cu2 that passed through the column is treated with 25.00 mL0.05832 M EDTA. This solution required 23.22 mL of 0.02380 M Zn2for back titration. The Ni2 extracted from the column was treatedwitn 25.00 mL of 0.05832 M EDTA.
How many milliliters of 0.02380 M Zn2 is required for the backtitration of the Ni2 solution?

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3.9 Ratings (742 Votes)

Step 1 Total moles of EDTA used for Cu2 and Ni2 titration 005832 x 0025 1458 x 103 mols moles of Zn2 reacted with excess EDTA 002380 x 001849 440 x 104 mols Actual moles of EDTA See Answer

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