June 2012 Chemistry Regents #63-65

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

Question 51 Questions 52-55 Questions 56-59 Questions 60-62 Questions 63-65 Questions 66-68 Questions 69-71 Questions 72-75  Questions 76-78  Questions 79-81  Questions 82-85

 

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  Base your answers to questions 63 through 65  on the information below.

 

In a titration, 20.0 milliliters of 0.15 M HCI(aq) is exactly neutralized by 18.0 milliliters of KOH(aq).

63 Complete the equation in your answer booklet for the neutralization reaction by writing the formula of each product. [1]

KOH(aq) + HCl(aq)==> ________  +________

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KOH(aq) + HCl(aq)==> __KCl__  +__H2O__

64 Compare the number of moles of H+(aq) ions to the number of moles of OH-(aq) ions in the titration mixture when the HCl(aq) is exactly neutralized by the KOH(aq). [1]

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Moles of H+ are equal to the moles of OH-

or same number of H+ as OH-

65 Determine the concentration of the KOH(aq). [1]

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0.17M

WORK==>  MV=MV

(20.0mL)(0.15M)=M (18.0ml)

on to Questions 66-68

 

 

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

Question 51 Questions 52-55 Questions 56-59 Questions 60-62 Questions 63-65 Questions 66-68 Questions 69-71 Questions 72-75  Questions 76-78  Questions 79-81  Questions 82-85

 
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