a. A 40.0 mL sample containing 0.0400 M Ni was titrated with 0.0400 M EDTA at pH 11.0. Given pKNY 18.62 and a-0.85. Calculate pNi at 0,10, 100 and 110% of the titration.b. A small sample of powdered milk weighing 1.450 g was mixed with an aqueous buffer of pH 10. A few drops of calgamite indator were addedand the solution required 31.62 ml of 0.01538 MEDTA to reach the end point colour change. Calculate the % Ca in the milk

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a. A 40.0 mL sample containing 0.0400 M Ni" was titrated with 0.0400 M EDTA at pH 11.0. Given pkyy 18.62 and a- 0.85. Calculate pNi at 0, 10, 100 and 110% of the titration.

Chemistry

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ISBN:9781305957404

Author:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste

Publisher:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste

Chapter1: Chemical Foundations

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Question

a. A 40.0 mL sample containing 0.0400 M Ni was titrated with 0.0400 M EDTA at pH 11.0. Given pKNY 18.62 and a-0.85. Calculate pNi at 0,
10, 100 and 110% of the titration.
b. A small sample of powdered milk weighing 1.450 g was mixed with an aqueous buffer of pH 10. A few drops of calgamite indator were added
and the solution required 31.62 ml of 0.01538 MEDTA to reach the end point colour change. Calculate the % Ca in the milk

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