voltaic cell operating under standard conditions (1.0 M ion concentrations) utilizes the following reaction: 3 Pb(s) + 2 Co3+(aq) 3 Pb2+(aq) + 2 Co(s) What is the effect on the cell emf of each of the following changes
voltaic cell operating under standard conditions (1.0 M ion concentrations) utilizes the following reaction: 3 Pb(s) + 2 Co3+(aq) 3 Pb2+(aq) + 2 Co(s) What is the effect on the cell emf of each of the following changes
Chemistry
10th Edition
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
Section: Chapter Questions
Problem 1RQ: Define and explain the differences between the following terms. a. law and theory b. theory and...
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voltaic cell operating under standard conditions (1.0 M ion concentrations) utilizes the following reaction:
3 Pb(s) + 2 Co3+(aq) 3 Pb2+(aq) + 2 Co(s)
What is the effect on the cell emf of each of the following changes?
(a) Water is added to the cathode compartment, diluting the solution.
The positive cell emf rises, becoming more positive.The positive cell emf drops closer to zero. The negative cell emf rises closer to zero.The negative cell emf drops, becoming more negative.No change in cell emf occurs.
(b) The size of the cobalt electrode is increased.
The positive cell emf rises, becoming more positive.The positive cell emf drops closer to zero. The negative cell emf rises closer to zero.The negative cell emf drops, becoming more negative.No change in cell emf occurs.
(c) A solution of 1.0 M Pb(NO3)2 is added to the anode compartment.
The positive cell emf rises, becoming more positive.The positive cell emf drops closer to zero. The negative cell emf rises closer to zero.The negative cell emf drops, becoming more negative.No change in cell emf occurs.
(d) Some Na2S is added to the Pb2+ compartment, precipitating some Pb2+ as lead sulfide.
The positive cell emf rises, becoming more positive.The positive cell emf drops closer to zero. The negative cell emf rises closer to zero.The negative cell emf drops, becoming more negative.No change in cell emf occurs.
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