January 2017 Chemistry Regents #62-65

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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

Question 51-53 Questions 54-55
 Questions 56-57 Questions 58-59 Questions 60-61 Questions 62-65  Questions 66-68  Questions 69-72  Questions 73-77 Questions 78-79 Questions 80-82 Questions 83-85  

 

 

 

 

 #62-65
  

During a titration, 10.00 mL of acetic acid, HC2H3O2(aq), is completely neutralized by adding 12.50 mL of 0.64 M sodium hydroxide, NaOH(aq).

62 Identify the only positive ion in the HC2H3O2(aq). [1]

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H+ or H3O+

63 State the number of significant figures used to express the volume of the acetic acid. [1]

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4

64 Determine the molarity of the acetic acid. [1]

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0.80M

65 Explain why it is better to use data from multiple trials to determine the molarity of acetic acid, rather than data from a single trial. [1]

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Less error
  

on to Questions 66-68

  

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

Question 51-53 Questions 54-55
 Questions 56-57 Questions 58-59 Questions 60-61 Questions 62-65  Questions 66-68  Questions 69-72  Questions 73-77 Questions 78-79 Questions 80-82 Questions 83-85