Need help naming polyatomic ions!! (check my answers?)

could you check my answers please?
they are in Question:Answer format.

1) sodium nitrate: NaNO3
2) lithium carbonate: Li2CO3
3) potassium sulfate: K2SO4
4) calcium bicarbonate: Ca2(CO3)2
5) aluminum hydroxide: AlHO
6) lithium sulfite: LiCO3
7) sodium phosphate: Na3PO4
8) iron (II) phosphate: Fe3(PO4)2

9) CaSO4: Calcium sulfate
10) Cu3PO4: Copper (III) phosphate
11) Al(NO3)3: Aluminum nitrate
12) Na2CO3: Sodium carbonate
13) MgSO3: Magnesium sulfite
14) Fe(HCO3)2: Iron acetate

Just a few wrong here and there, nothing major:

4) calcium bicarbonate: Ca(HCO3)2

Ca has a charge of 2+
Bicarbonate (HCO3) has a charge of -1

5) aluminum hydroxide: Al(OH)3

Aluminum has a charge of 3+
Hydroxide has a charge of -1

6) lithium sulfite: Li2SO3

Lithium has a charge of +1
Sulfite has a charge of -2

10) Cu3PO4: Copper (I) phosphate

Copper (I) has a charge of +1
Phosphate has a charge of -3 ***************So 3 coppers are need to make 1 phosphate neutral

14) Fe(HCO3)2: Iron (II) bicarbonate

Iron has a charge of +2
Bicarbonate has a charge of -1



Review the charges for certain cations and anions.
Remember to write roman numerals for transition metals such as iron and copper.
Review that bicarbonate is HCO3 -1