June 2018 Chemistry Regents #80-82

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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 51-53 Questions 54-56 Questions 57-59 Questions 60-62 Questions 63-65 Questions 66-69 Questions 70-73 Questions 74-76  Questions 77-79  Questions 80-82  Questions 83-85 

 

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Question 80-82

 

 

Base your answers to questions 80 through 81 on the information below and on your knowledge of chemistry.

In a laboratory investigation, a student compares the concentration and pH value of each of four different solutions of hydrochloric acid, HCl(aq), as shown in the table below.

80 State the number of significant figures used to express the concentration of solution Z. [1]

Answer--> 2

81 Determine the concentration of an HCl(aq) solution that has a pH value of 4. [1]

Answer-->0.000 1 M  or 1 X 10-4 M

82 Determine the volume of 0.25 M NaOH(aq) that would exactly neutralize 75.0 milliliters of solution X. [1]

Answer--> 30. mL

on to Questions 83-85

 

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 51-53 Questions 54-56 Questions 57-59 Questions 60-62 Questions 63-65 Questions 66-69 Questions 70-73 Questions 74-76  Questions 77-79  Questions 80-82  Questions 83-85 
 

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