June 2019Chemistry Regents #55-57

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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 Questions 52-54 Questions 55-57 Questions 58-61 Questions 62-65 Questions 66-69 Questions 70-73 Questions 74-77 Questions 78-80 Questions 81-85  

 

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Question 55-57

 

 

Base your answers to questions 55-57

 

At 23oC, 85.0 grams of NaNO3(s) are dissolved in 100. grams of H2O (l).

55. Convert the temperature of the NaNO3(s)  to kelvins.

Answer-->296K

56.  Based on Table G, determine the additional mass of NaNO3(s) that must be dissolved to saturate the solution at  23oC.

Answer--> 5 g   (anything between 4 and 6 was ok)

57. State what happens to the boiling point and freezing point of the solution when the solution is diluted with an addition of 100. grams of  H2O(l).

Answer-->***This is the trap question

boiling point deceases, freezing point increases

adding the water has the opposite effect of adding the solute

e F halides

see Table F halides

on to Questions 58-61

 

 

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 Questions 52-54 Questions 55-57 Questions 58-61 Questions 62-65 Questions 66-69 Questions 70-73 Questions 74-77 Questions 78-80 Questions 81-85  

 

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