January 2014 Chemistry Regents #78-81

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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 58-61 Questions 62-63 Questions 64-65 Questions 66-70

Questions 71-75 Questions 76-77 Questions 78-81 Questions 82-85

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Questions

 

  Base your answers to questions 78 through 81 on the information below.

Common household bleach is an aqueous solution containing hypochlorite ions. Aclosed container of bleach is an equilibrium system represented by the equation below.

78 Compare the rate of the forward reaction to the rate of the reverse reaction for this system. [1]

Answer==>  they are equal


79 State the change in oxidation number for chlorine when the Cl2(g) changes to Cl (aq)during the forward reaction. [1]

Answer==> 0 to -1


80 Explain why the container must be closed to maintain equilibrium. [1]

Answer==> so the Cl2 can not escape


81 State the effect on the concentration of the ClO ion when there is a decrease in theconcentration of the OH ion. [1]

Answer==>   [ClO- ] decreases

 

 
 

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

Questions 51-54 Questions 55-57 Questions 58-61 Questions 62-63 Questions 64-65 Questions 66-70

Questions 71-75 Questions 76-77 Questions 78-81 Questions 82-85

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