INSTRUMENTAL ANALYSIS-ACCESS >CUSTOM<
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ISBN: 9781337783439
Author: Skoog
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Chapter 24, Problem 24.5QAP
What cathode potential (versus SCE) would be required to lower the total Hg(II) concentration of the following solutions to 1.00 × 10-6 M (assume reaction product in each case is elemental Hg):
(a) an aqueous solution of Hg2+?
(b) a solution with an equilibrium SCN- concentration of 0.100 M?
Hg2+ + 2SCN-
c) a solution with an equilibrium Br- concentration of 0.100 M?
HgBr42++ 2e-
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A student measures Ecell of a concentration cell created by having the saturated solution of AgBr on one side and 0.10 M Ag+ (aq) on the other (along with silver electrodes). The experimental value is
0.627 V. The student is told to use the theoretical value of the Nernst plot (-0.0591 V). (The concentration of the halide is also 0.10 M.)
(a) In which direction will electrons spontaneously flow?
from the 'saturated side' to the '0.10 M side'
from the '0.10 M side' to the 'saturated side'
the electrons will not flow in this cell
(b) What is the value of [Ag+]dilute?
4.0
M
(c) What is the experimental Ksp?
4.0
(d) Calculate AG° in kJ/mol using AG° = −RTInKsp⋅ (R = 8.314 J/K · mol, T = 298 K.)
4.0
kJ/mol
Chapter 24 Solutions
INSTRUMENTAL ANALYSIS-ACCESS >CUSTOM<
Ch. 24 - Prob. 24.1QAPCh. 24 - Calculate the minimum difference in standard...Ch. 24 - Prob. 24.3QAPCh. 24 - Halide ions can he deposited at a silver anode,...Ch. 24 - What cathode potential (versus SCE) would be...Ch. 24 - Calculate the Lime required for a constant current...Ch. 24 - Calculate the time required for a constant current...Ch. 24 - Prob. 24.8QAPCh. 24 - Prob. 24.9QAPCh. 24 - A 0.0712-g sample of a purified organic acid was...
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