January 2011 Chemistry Regents #62-63

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Questions

Base your answers to questions 62 to 63 on the information below.

The diagram and balanced ionic equation below represent a voltaic cell with copper and silver electrodes and the reaction that occurs when the cell is operating.

62 Describe the direction of electron flow in the external circuit in this operating cell. [1]

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Left

Cu to Ag

Anode to Cathode

(Use Table J-electrons flow from top to bottom)

63 State the purpose of the salt bridge in this voltaic cell. [1]

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"Ion Flow"

The salt bridge allows for the migration of ions between the half-cells.

The salt bridge prevents polarization of the half-cells.

maintains electrical neutrality

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Questions 1-10 Questions 11-20 Questions 21-30 Questions 31-40 Questions 41-50

Questions 51-53 Questions 54-55 Questions 56-57 Questions 58-59 Questions 60-61 Questions 62-63 Questions 64-65 Questions 66-68 Questions 69-71 Questions 72-74 Questions 75-77 Questions 78-80 Questions 81-83

 
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