What are the colours of these compounds?

Question

Magnesium iodide
Aluminium carbonate
Aluminium oxide
Calcium iodide
Copper(II) iodide
Iron(II) nitrate
Iron(II) carbonate
Iron(II) iodide
Iron(III) carbonate
Iron(III) iodide
Iron(III) sulphate
Lead(II) carbonate
Lead(II) hydroxide
Ammonium carbonate
Ammonium oxide
Ammonium hydroxide
Silver sulphate
Silver hydroxide

Pls provide source of info. Help will be appreciated if you can provide answers for any one of them. Pls note that this is NOT my homework, I"m doing this for enrichment. Thanks.

Answer 1

We are talking about the colour of the solid and not the solution (white solids will give colourless solutions)

Magnesium iodide white
Aluminium carbonate white
Aluminium oxide white/colourless
Calcium iodide white
Copper(II) iodide doesn't exist (Cu(+2) reacts with I(-) giving CuI (monovalent copper which is white) and I2
Iron(II) nitrate (for Fe III purple or violet) Fe(II) nitrate is unstable http://www.1911encyclopedia.org/Iron
Iron(II) carbonate see http://www.1911encyclopedia.org/Iron
Iron(II) iodide grey or red violet
Iron(III) carbonate see http://www.1911encyclopedia.org/Iron
Iron(III) iodide dark purple http://www3.interscience.wiley.com/cgi-bin/abstract/109782739/ABSTRACT?CRETRY=1&SRETRY=0 or black according to webelements
Iron(III) sulphate greyish-white http://www.jtbaker.com/msds/englishhtml/f1368.htm
Lead(II) carbonate white
Lead(II) hydroxide white
Ammonium carbonate white
Ammonium oxide I don't think it exists
Ammonium hydroxide colourless liquid (ammonia gas dissolved in water)
Silver sulphate white
Silver hydroxide doesn't exist (in alkaline solutions you have the oxide precipitating which is brown)

Answer 2

Magnesium iodide: blue
Iron Nitrate(II): red
Lead Carbonate:White
Sorry thats all I know, I wish I could help you more.

Answer 3

Al2O3=white.
Fe(NO3)2=brown.
Ammonium carbonate=white.
CopperIodide is not exite.