June 2019 Chemistry Regents #78-80

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Questions 1-5 Questions 6-10 Questions 11-15 Questions 16-20 Questions 21-25 Questions 26-30 Questions 31-35 Questions 36-40 Questions 41-45 Questions 46-50

Questions 51 Questions 52-54 Questions 55-57 Questions 58-61 Questions 62-65 Questions 66-69 Questions 70-73 Questions 74-77 Questions 78-80 Questions 81-85  

 

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Question 78-80

 

 

Base your answers to questions 78-80

An operating voltaic cell has magnesium and silver electrodes. The cell and the ionic equation representing the reaction that occurs in the cell are shown below.

78.State the purpose of the salt bridge in this cell.

Answer-->   "Ion Flow"...ion migration

79.  Write the balanced equation for the half-reaction that occurs at the magnesium electrode in this cell.

Answer-->   Mg-->  Mg2+  + 2e-

80.  Explain, in terms of electrical energy, how electrolysis reactions differ from voltaic reactions.

Answer-->  electrolytic uses electrical energy .... (voltaic produces it)

F halides

see Table F halides

on to Questions 81-85

 

 

Questions 1-5 Questions 6-10 Questions 11-15 Questions 16-20 Questions 21-25 Questions 26-30 Questions 31-35 Questions 36-40 Questions 41-45 Questions 46-50

Questions 51 Questions 52-54 Questions 55-57 Questions 58-61 Questions 62-65 Questions 66-69 Questions 70-73 Questions 74-77 Questions 78-80 Questions 81-85  

 

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