[Chem] Net ionic equations

1. Mar 26, 2009

Kitty808

1. The problem statement, all variables and given/known data
I need to find net ionic equations for:
-Fe(NO3)3 + NH3
-Cr(NO3)3 + NH3
-Cu(NO3)2 + NH3
-AgNO3 + NH3
-Cr(OH)3 + NaOH
-Fe(OH)3 +NaOH
and a whole bunch of other reactions.
I have no problem with writing the balanced equations but I get a little stuck on breaking things up into ions.

3. The attempt at a solution
So the first one would be:
Fe(NO3)3(aq) + 3NH3(aq) + 3H2O(l) --> Fe(OH)3(s) + 3NH4NO3(aq)
from there would it be:'
Fe(3+) + 3NO3(-) + 3NH2(-) + 3H(+) --> Fe(OH)3 + 3NH4(+) + 3NO3(-)?
I don't think this is correct because I think I need to end up with:
Fe(NO3)3(aq) + 3NH3(aq) --> Fe(OH)3(s)
but I'm not sure how to go about breaking things up so that the spectator ions cancel correctly. Any hints?

2. Mar 26, 2009

Staff: Mentor

Start dissociating all salts.

Ammonia reacts with water producing NH4+ and OH-, but that's not necesarilly the most important reaction in some of the cases listed.

3. Apr 1, 2009

Kitty808

Ok, so let me make sure I'm getting these right...

-Fe(+3) + 3OH(-) --> Cr(OH)3
-Cr(+3) + 3OH(-) --> Fe(OH)3
-Cu(+3) + 2NH3 --> Cu(NH3)2(+3)
-Ag(+) + 6NH3 --> Ag(NH3)6(+)

am I on the right track with those?

4. Apr 2, 2009

Staff: Mentor

Please recheck these equations. Charges are wrong, you are not listing states and you are transmuting metals.