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Author Question: Choose the reaction that illustrates Hf for Ca(NO3)2. A) Ca(s) + N2(g) + 3O2(g) Ca(NO3)2(s) B) ... (Read 32 times)

jwb375

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on: Aug 27, 2018
Choose the reaction that illustrates Hf for Ca(NO3)2.
 
  A) Ca(s) + N2(g) + 3O2(g)  Ca(NO3)2(s)
  B) Ca2+(aq) + 2 NO3-(aq)  Ca(NO3)2(aq)
  C) Ca(s) + 2 N(g) + 6 O(g)  Ca(NO3)2(s)
  D) Ca(NO3)2(aq)  Ca2+(aq) + 2 NO3-(aq)
  E) Ca(NO3)2(s)  Ca(s) + N2(g) + 3O2(g)

Question 2

How would the concentration change if a 1.0 L flask of 1.0 M NaCl were left uncapped on a laboratory bench for several days. Why?
 
  What will be an ideal response?


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Pariscourtney

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Reply #1 on: Aug 27, 2018
Answer to Question 1

A

Answer to Question 2

The concentration would slowly increase as water from the solution evaporated. This is because the amount of NaCl in the flask would remain constant while the amount of water decreases.


jwb375

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Reply 2 on: Aug 27, 2018
Wow, this really help

debra928

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Reply 3 on: Yesterday
Excellent

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