June 2017 Chemistry Regents #83-85

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Question 51-53 Questions 54-57 Questions 58-60 Questions 61-63 Questions 64-65 Questions 66-68 Questions 69-71 Questions 72-76  Questions 77-80  Questions 81-82  Questions 83-85 

 

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Question 83-85

 

 

Base your answers to questions 83 through 85 on the information below and on your knowledge of chemistry.

Vinegar is a commercial form of acetic acid, HC2H3O2(aq). One sample of vinegar has a pH value of 2.4.

83 Explain, in terms of particles, why HC2H3O2 (aq) can conduct an electric current. [1]

Answer-->  the ions can move

Movement   +  charge

84 State the color of bromthymol blue indicator in a sample of the commercial vinegar. [1]

Answer-->yellow  (use Table M)

85 State the pH value of a sample that has ten times fewer hydronium ions than an equal volume of a vinegar sample with a pH value of 2.4.  [1]

Answer-->  3.4

Conversion Table June 2017

raw score (out of 85)scale score (your grade)
74 85
5065

 

Other Regents Exams

 

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 54-57 Questions 58-60 Questions 61-63 Questions 64-65 Questions 66-68 Questions 69-71 Questions 72-76  Questions 77-80  Questions 81-82  Questions 83-85 

 

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