Yikes! Final coming up on Monday ! I've got a couple of questions from a practice test. I don't have the answers but I'm wondering if these reactions are correct:

 

1. A concentrated soulution of aqueous amonia is added to an aqueous solution of copper(ii)sulphate:

 

2NH3 (aq) + 3CuSO4(aq) --> N2(g) +3H2SO4(aq)

 

2. Nickel (ii) hydroxide is strongly heated... (hmm... does that mean combustion?)

 

Ni(OH)2 (s) + O2(g) --> NiO(g) + H2O(g)

 

 

And... I'm having trouble with these questions... if anyone can help me out with these (thanks a bunch):

 

3. Write a balanced reaction for the preparation of gaseous hydrogen chloride using the reaction of pure anhydrous sulfuric acid with another common inorganic compound.

 

4. Which element has a larger sixth ionization energy, P or S?