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19 Nov 2019
10. A cell is constructed from a ½ cell consisting of a copper wire in a solution of 100 mL of 0.10 M Cu' buffered at a pH-9 and a saturated calomel electrode (SCE) for the other ½ cell. The SCE has a potential of 0.242 V relative to a standard hydrogen electrode. The cell is measured to have a spontaneous potential of 0.0675 V, with the copper ½ cell functioning as the cathode and the SCE as the anode. A 0.30 M solution of EDTA buffered at a pH-9 is then added to the Cu half-cell. For pH-9, a, is 0.054. The formation constant for CuY is 6 x 1018 You don't need to check approximations. a) What is the ½ cell potential of the copper ½ cell if 100 mL of the EDTA solution is added? b) What is the cell potential that would be measured? c) Sketch the cell diagram that characterizes the cell calculated for part b) using conventional cell notation. d) Sketch a curve that shows the cell potential as a function of the volume of EDTA added. Label the x and y with numerical values
10. A cell is constructed from a ½ cell consisting of a copper wire in a solution of 100 mL of 0.10 M Cu' buffered at a pH-9 and a saturated calomel electrode (SCE) for the other ½ cell. The SCE has a potential of 0.242 V relative to a standard hydrogen electrode. The cell is measured to have a spontaneous potential of 0.0675 V, with the copper ½ cell functioning as the cathode and the SCE as the anode. A 0.30 M solution of EDTA buffered at a pH-9 is then added to the Cu half-cell. For pH-9, a, is 0.054. The formation constant for CuY is 6 x 1018 You don't need to check approximations. a) What is the ½ cell potential of the copper ½ cell if 100 mL of the EDTA solution is added? b) What is the cell potential that would be measured? c) Sketch the cell diagram that characterizes the cell calculated for part b) using conventional cell notation. d) Sketch a curve that shows the cell potential as a function of the volume of EDTA added. Label the x and y with numerical values
lolol1998Lv3
19 Apr 2023
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