January 2012 Chemistry Regents #60-62

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Questions 1-10 Questions 11-20 Questions 21-30 Questions 31-40 Questions 41-50 Questions 51-54 Questions 55-57 Questions 58-59 Questions 60-62 Questions 63-65 Questions 66-69  Questions 70-71  Questions 72-74 Questions 75-78  Questions 79-81  Questions 82-85

Question

Base your answers to questions 60 through 62 on the information below.   The diagram below represents an operating electrolytic cell used to plate silver onto a nickel key. As the cell operates, oxidation occurs at the silver electrode and the mass of the silver electrode decreases. 60 Identify the cathode in the cell. [1] HIGHLIGHT TO SEE THE ANSWER the key or Nickel or Ni(s) 61 State the purpose of the power source in the cell. [1] HIGHLIGHT TO SEE THE ANSWER The cell requires electrical energy for the Nonspontaneous reaction to occur. or The power source causes some Ag(s) atoms to oxidize. 62 Explain, in terms of Ag atoms and Ag+(aq) ions, why the mass of the silver electrode decreases as the cell operates. [1] HIGHLIGHT TO SEE THE ANSWER Silver atoms lose electrons and become silver ions in the solution. or Some of the Ag atoms become Ag'" ions. or Silver atoms are oxidize to silver ions. on to Questions 63-65

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