1. Naming and writing formulas

2. Ammonium NH 4 1+ Calcium Ca 2+ Iron (II) Fe 2+ Iron (III) Fe 3+ Sodium Na 1+ Tin (IV) Sn 4+ Acetate C 2 H 3 O 2 1- Carbonate CO 3 2- Hydroxide OH 1- Nitrate NO 3 1- Phosphate PO 4 3- Sulfate SO 4 2- Cation involved:Anion involved: Name of compound: Ammonium Nitrate Formula of compound: Particle diagram: # of atoms in compound:# of ions in compound:

3. Ammonium NH 4 1+ Iron (II) Fe 2+ Iron (III) Fe 3+ Sodium Na 1+ Tin (IV) Sn 4+ Cation involved:Anion involved: Name of compound:Formula of compound: FeSO 4 Particle diagram: # of atoms in compound:# of ions in compound: Acetate C 2 H 3 O 2 1- Carbonate CO 3 2- Hydroxide OH 1- Nitrate NO 3 1- Phosphate PO 4 3- Sulfate SO 4 2-

4. Cation involved: Ca 2+ Anion involved: C 2 H 3 O 2 1- Name of compound:Formula of compound: Particle diagram: # of atoms in compound:# of ions in compound: Acetate C 2 H 3 O 2 1- Carbonate CO 3 2- Hydroxide OH 1- Nitrate NO 3 1- Phosphate PO 4 3- Sulfate SO 4 2- Ammonium NH 4 1+ Calcium Ca 2+ Iron (II) Fe 2+ Iron (III) Fe 3+ Sodium Na 1+ Tin (IV) Sn 4+

5. * Y * Y * Y = Y 3 * Would you write (Y) 3 ? No, it would be a waste of time. * (X+Y)*(X+Y)*(X+Y) = (X+Y) 3 * Can you write X+Y 3 instead? * No, that has a different meaning - you are only cubing the Y and not quantity of X+Y. * We just wrote out the formula for calcium acetate Ca(C 2 H 3 O 2 ) 2 * Why do we need the parentheses? * Can’t we just leave them off? * No. Then we would have CaC 2 H 3 O 22 BUT calcium acetate doesn’t have 22 oxygen atoms! * Can’t we just double the acetate subscripts? CaC 4 H 6 O 4 ? * No. Writing it like this destroys the structural cues hidden in the formula. * Analogy of two people hiding in a closet…

6. Does the compound have any polyatomic ions? When writing the compound, do you need more than one polyatomic ion? The formula does NOT need any parentheses Do you need to double, triple, etc. a single polyatomic cation or anion? Surround the polyatomic ion(s) with parentheses and add the subscript outside the ( ) NO YES

7. Cation involved:Anion involved: Name of compound: Sodium Phosphate Formula of compound: Particle diagram: # of atoms in compound:# of ions in compound: Acetate C 2 H 3 O 2 1- Carbonate CO 3 2- Hydroxide OH 1- Nitrate NO 3 1- Phosphate PO 4 3- Sulfate SO 4 2- Ammonium NH 4 1+ Calcium Ca 2+ Iron (II) Fe 2+ Iron (III) Fe 3+ Sodium Na 1+ Tin (IV) Sn 4+

8. Cation involved:Anion involved: Name of compound:Formula of compound: Fe 2 (CO 3 ) 3 Particle diagram: # of atoms in compound:# of ions in compound: Acetate C 2 H 3 O 2 1- Carbonate CO 3 2- Hydroxide OH 1- Nitrate NO 3 1- Phosphate PO 4 3- Sulfate SO 4 2- Ammonium NH 4 1+ Calcium Ca 2+ Iron (II) Fe 2+ Iron (III) Fe 3+ Sodium Na 1+ Tin (IV) Sn 4+

9. Cation involved: NH 4 1+ Anion involved: SO 4 2- Name of compound:Formula of compound: Particle diagram: # of atoms in compound:# of ions in compound: Acetate C 2 H 3 O 2 1- Carbonate CO 3 2- Hydroxide OH 1- Nitrate NO 3 1- Phosphate PO 4 3- Sulfate SO 4 2- Ammonium NH 4 1+ Calcium Ca 2+ Iron (II) Fe 2+ Iron (III) Fe 3+ Sodium Na 1+ Tin (IV) Sn 4+

10. Cation involved: Sn 4+ Anion involved: OH 1- Name of compound: Tin hydroxide Formula of compound: SnOH 4 # of atoms in compound: 6 # of ions in compound: 5 Acetate C 2 H 3 O 2 1- Carbonate CO 3 2- Hydroxide OH 1- Nitrate NO 3 1- Phosphate PO 4 3- Sulfate SO 4 2- Ammonium NH 4 1+ Calcium Ca 2+ Iron (II) Fe 2+ Iron (III) Fe 3+ Sodium Na 1+ Tin (IV) Sn 4+

11. Cation involved: Sn 4+ Anion involved: OH 1- Name of compound: Tin (IV) hydroxide Formula of compound: Sn(OH) 4 # of atoms in compound: 6 10 # of ions in compound: 5 Acetate C 2 H 3 O 2 1- Carbonate CO 3 2- Hydroxide OH 1- Nitrate NO 3 1- Phosphate PO 4 3- Sulfate SO 4 2- Ammonium NH 4 1+ Calcium Ca 2+ Iron (II) Fe 2+ Iron (III) Fe 3+ Sodium Na 1+ Tin (IV) Sn 4+

12. Cation involved: NH 4+ Anion involved: CO 3 2- Name of compound: Ammonium carbonate Formula of compound: (NH 4 ) 2 (CO 3 ) # of atoms in compound: 14 # of ions in compound: 3 Acetate C 2 H 3 O 2 1- Carbonate CO 3 2- Hydroxide OH 1- Nitrate NO 3 1- Phosphate PO 4 3- Sulfate SO 4 2- Ammonium NH 4 1+ Calcium Ca 2+ Iron (II) Fe 2+ Iron (III) Fe 3+ Sodium Na 1+ Tin (IV) Sn 4+

13. Cation involved: NH 4+ NH 4 1+ Anion involved: CO 3 2- Name of compound: Ammonium carbonate Formula of compound: (NH 4 ) 2 (CO 3 ) (NH 4 ) 2 CO 3 # of atoms in compound: 14 # of ions in compound: 3 Acetate C 2 H 3 O 2 1- Carbonate CO 3 2- Hydroxide OH 1- Nitrate NO 3 1- Phosphate PO 4 3- Sulfate SO 4 2- Ammonium NH 4 1+ Calcium Ca 2+ Iron (II) Fe 2+ Iron (III) Fe 3+ Sodium Na 1+ Tin (IV) Sn 4+