2. In another experiment, Fischl used chromium metal to form an electrode she can use for her voltaic cell. She wanted to determine the electric potential produced by the chromium electrode (and 1.0 M of its corresponding electrolyte solution) with a Copper electrode in 0.10 M CuSO4solution at 25 °C. Predict the following:

Chemical Principles in the Laboratory
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Chapter32: Voltaic Cell Measurements
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2. In another experiment, Fischl used chromium metal to form an electrode she can use for her voltaic cell. She wanted to determine the
electric potential produced by the chromium electrode (and 1.0 M of its corresponding electrolyte solution) with a Copper electrode in
0.10 M CuSO4solution at 25 °C. Predict the following:
a. OHR of the voltaic cell:
b. RHR of the voltaic cell:
c. Number of electrons in Cu^2+(ag) + 2e- → Cu(s), Eo = + 0.34 V
Cr^3+(aq)+ 3e- → Cr(s), Eo = - 0.74 V
d. Overall reaction for the Cr(s) → Cr^3+(aq)+ 3e-, Eo = + 0.74 V
Cu(s) → Cu^2+(aq)+ 2e-, Eo = - 0.34 V
e. Standard cell potential, E°cell:
V
f. Theoretical Ecell :
V
g. If the measured Ecell was 0.75 V, calculate the percent error.
%
h. Oz suggested that they increase the concentration of CuSO4 solution used. What will be the effect on the measured potential?
Transcribed Image Text:2. In another experiment, Fischl used chromium metal to form an electrode she can use for her voltaic cell. She wanted to determine the electric potential produced by the chromium electrode (and 1.0 M of its corresponding electrolyte solution) with a Copper electrode in 0.10 M CuSO4solution at 25 °C. Predict the following: a. OHR of the voltaic cell: b. RHR of the voltaic cell: c. Number of electrons in Cu^2+(ag) + 2e- → Cu(s), Eo = + 0.34 V Cr^3+(aq)+ 3e- → Cr(s), Eo = - 0.74 V d. Overall reaction for the Cr(s) → Cr^3+(aq)+ 3e-, Eo = + 0.74 V Cu(s) → Cu^2+(aq)+ 2e-, Eo = - 0.34 V e. Standard cell potential, E°cell: V f. Theoretical Ecell : V g. If the measured Ecell was 0.75 V, calculate the percent error. % h. Oz suggested that they increase the concentration of CuSO4 solution used. What will be the effect on the measured potential?
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