Chemistry

Raymond Chang 10th edition

Chapter 19

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Question 3

The purpose of a salt bridge in an electrochemical cell is

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A) to give electrons a path to flow between the cathode and anode.

B) to allow the reactants to mix so that reaction can occur.

C) to maintain a balance of charge between the two half cells and thus allow a complete circuit.

D) all of the above.

Question 5

The reduction of one mole of copper(II) ions to copper metal requires the transfer of one Faraday (about 96,500 Coulombs) of charge.

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A) True

B) False

Question 7

The electrochemical potential of a cell depends on which of the following?

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A) The standard reduction potential for the half-reaction that occurs at the anode.

B) The standard reduction potential for the half-reaction that occurs at the cathode.

C) The concentrations of species in the cell.

D) All of the above.

Question 10

Increasing the concentration of products in an electrochemical reaction will decrease the value of the electrochemical potential for the reaction.

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A) True

B) False

Question 14

In a galvanic cell

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A) oxidation takes place at the anode.

B) oxidation takes place at the cathode.

C) none of the above.

Question 18

It is possible to obtain zinc metal by placing a strip of copper in an aqueous solution of ZnSO4.

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A) True

B) False