A 1.000 mL aliquot of a solution containing Cu²+ and Ni2+ is treated with 25.00 mL of a 0.03992 M EDTA solution. The solution is then back titrated with 0.02019 M Zn²+ solution at a pH of 5. A volume of 21.77 mL of the Zn²+ solution was needed to reach the xylenol orange end point. A 2.000 mL aliquot of the Cu²+ and Ni2+ solution is fed through an ion-exchar column that retains Ni2+. The Cu²+ that passed through the column is treated with 25.00 mL of 0.03992 M EDTA. This solu required 19.13 mL of 0.02019 M Zn2+ for back titration. The Ni2+ extracted from the column was treated witn 25.00 mL of 0.03992 M EDTA. How many milliliters of 0.02019 M Zn²+ is required for the back titration of the Ni²+ solution?

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A 1.000 mL aliquot of a solution containing Cu²+ and Ni2+ is treated with 25.00 mL of a 0.03992 M EDTA solution. The
solution is then back titrated with 0.02019 M Zn²+ solution at a pH of 5. A volume of 21.77 mL of the Zn²+ solution was
needed to reach the xylenol orange end point. A 2.000 mL aliquot of the Cu²+ 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 of 0.03992 M EDTA. This solution
required 19.13 mL of 0.02019 M Zn²+ for back titration. The Ni2+ extracted from the column was treated witn 25.00 mL of
0.03992 M EDTA.
2+
How many milliliters of 0.02019 M Zn2+ is required for the back titration of the Ni2+ solution?
volume:
mL
Transcribed Image Text:A 1.000 mL aliquot of a solution containing Cu²+ and Ni2+ is treated with 25.00 mL of a 0.03992 M EDTA solution. The solution is then back titrated with 0.02019 M Zn²+ solution at a pH of 5. A volume of 21.77 mL of the Zn²+ solution was needed to reach the xylenol orange end point. A 2.000 mL aliquot of the Cu²+ 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 of 0.03992 M EDTA. This solution required 19.13 mL of 0.02019 M Zn²+ for back titration. The Ni2+ extracted from the column was treated witn 25.00 mL of 0.03992 M EDTA. 2+ How many milliliters of 0.02019 M Zn2+ is required for the back titration of the Ni2+ solution? volume: mL
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