Thanks both of you for replies. I'll rep you both for your great answers.
More questions:
Ammonia reacts with water. Aq ammonia is added in drops to aq Cu(ii) ions, a very pale blue precipitate is observed with disappears in excess ammonia to give a deep blue solution.
Write equations to show the formation from aq Cu(ii) ions of the pale blue precipitate, I've put:
Cu2+ + NH3 --> [Cu(NH3)6]2-
This isn't in the mark scheme, why isn't that right?
Equation for the deep blue solution?
2) A transitions metal is yellow, sketch the absorption spectrum you would predict for this solution. I know purple is opposite yellow on a colour wheel, so the max absorbance should be at purple, but how do I know which wavelength this is at? Do I need anything else on this graph?
This compound is K2CrF6. Ligand is Floride. Why?
3) Why wont CsCl react with water? Why is it colourless/go colourless?
4) Mn04- + 8H+ + 5e- -> Mn2+ + 4H2O
C2042- -> 2CO2 + 2e-
Construct a full ionic equation.
I know I need to balance everything, inc electrons, but how do I balance out the electrons?
Thanks again.