Question

write in the charge behind each ion below that does not have a charge showing (some come from your flashcards), then write the formula and name of the compound formed from each pair of ions on the lines:

1. li, o
2. cu+, no3
3. ag, oh
4. mn²+, s
5. mg, so4
6. k, po4
7. nh4, co3
8. al, so4
9. ca, p
10. h, po4³-
11. sn⁴+, o
12. hg²+, cro4
13. sn⁴+, so3
14. fe³+, cn

Explanation:

Step1: Determine ion charges

Identify common charges for each ion:
Li⁺, O²⁻; Ag⁺, OH⁻; Mg²⁺, SO₄²⁻; NH₄⁺, CO₃²⁻; Ca²⁺, P³⁻; Sn⁴⁺, O²⁻; Sn⁴⁺, SO₃²⁻; Cu⁺, NO₃⁻; Mn²⁺, S²⁻; K⁺, PO₄³⁻; Al³⁺, SO₄²⁻; H⁺, PO₄³⁻; Hg²⁺, CrO₄²⁻; Fe³⁺, CN⁻

Step2: Balance charges for compounds

Use crisscross method to balance positive/negative charges, simplify ratios.

Step3: Name compounds

Cation first (with Roman numerals for variable charges), then anion (replace ending with -ide for single ions, keep polyatomic names).

Answer:

1. Ions: Li⁺, O²⁻; Formula: Li₂O; Name: Lithium oxide
2. Ions: Ag⁺, OH⁻; Formula: AgOH; Name: Silver hydroxide
3. Ions: Mg²⁺, SO₄²⁻; Formula: MgSO₄; Name: Magnesium sulfate
4. Ions: NH₄⁺, CO₃²⁻; Formula: (NH₄)₂CO₃; Name: Ammonium carbonate
5. Ions: Ca²⁺, P³⁻; Formula: Ca₃P₂; Name: Calcium phosphide
6. Ions: Sn⁴⁺, O²⁻; Formula: SnO₂; Name: Tin(IV) oxide
7. Ions: Sn⁴⁺, SO₃²⁻; Formula: Sn(SO₃)₂; Name: Tin(IV) sulfite
8. Ions: Cu⁺, NO₃⁻; Formula: CuNO₃; Name: Copper(I) nitrate
9. Ions: Mn²⁺, S²⁻; Formula: MnS; Name: Manganese(II) sulfide
10. Ions: K⁺, PO₄³⁻; Formula: K₃PO₄; Name: Potassium phosphate
11. Ions: Al³⁺, SO₄²⁻; Formula: Al₂(SO₄)₃; Name: Aluminum sulfate
12. Ions: H⁺, PO₄³⁻; Formula: H₃PO₄; Name: Phosphoric acid
13. Ions: Hg²⁺, CrO₄²⁻; Formula: HgCrO₄; Name: Mercury(II) chromate
14. Ions: Fe³⁺, CN⁻; Formula: Fe(CN)₃; Name: Iron(III) cyanide