Free Printable Naming Ionic Compounds Worksheets - Free Printable

Let's solve this Ionic Compounds Worksheet step by step. We'll name each ionic compound using standard naming rules for ionic compounds:

🔹 General Rules:

1. Cation (positive ion) first, then anion (negative ion).
2. For metals that can form multiple charges (like transition metals), include the charge in Roman numerals in parentheses.
3. Anions end in "-ide" (e.g., chloride, oxide).
4. Polyatomic ions have specific names (e.g., nitrate, sulfate, cyanide, bicarbonate).
5. Ammonium (NH₄⁺) is a polyatomic cation.

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Now let’s go through each one:

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1. AlCl₃
- Aluminum + Chloride → Aluminum chloride
*(Al³⁺ and Cl⁻; no variable charge needed)*
✔ Aluminum chloride

2. Al(CN)₃
- Aluminum + Cyanide → Aluminum cyanide
*(CN⁻ is cyanide ion)*
✔ Aluminum cyanide

3. Al₂O₃
- Aluminum + Oxide → Aluminum oxide
✔ Aluminum oxide

4. Be(HCO₃)₂
- Beryllium + Bicarbonate → Beryllium bicarbonate
*(HCO₃⁻ is bicarbonate)*
✔ Beryllium bicarbonate

5. BeF₂
- Beryllium + Fluoride → Beryllium fluoride
✔ Beryllium fluoride

6. CaF₂
- Calcium + Fluoride → Calcium fluoride
✔ Calcium fluoride

7. CaO
- Calcium + Oxide → Calcium oxide
✔ Calcium oxide

8. Cu₃P
- Copper + Phosphide → Copper has variable charge.
- Cu₃P: 3 Cu⁺ ions balance 1 P³⁻ → So each Cu is +1
- Therefore: Copper(I) phosphide
✔ Copper(I) phosphide

9. CuCl₂
- Copper + Chloride →
- Cl⁻ × 2 = 2–, so Cu must be +2
- Copper(II) chloride
✔ Copper(II) chloride

10. CuI
- Copper + Iodide →
- I⁻ → Cu must be +1
- Copper(I) iodide
✔ Copper(I) iodide

11. Fe(NO₃)₃
- Iron + Nitrate →
- NO₃⁻ × 3 = 3– → Fe must be +3
- Iron(III) nitrate
✔ Iron(III) nitrate

12. FeBr₃
- Iron + Bromide →
- Br⁻ × 3 = 3– → Fe is +3
- Iron(III) bromide
✔ Iron(III) bromide

13. FeP
- Iron + Phosphide →
- P³⁻ → Fe must be +3
- Iron(III) phosphide
✔ Iron(III) phosphide

14. GaAs
- Gallium + Arsenide →
- Ga is usually +3, As is -3 → Gallium arsenide
- No variable charge needed (Ga typically forms +3)
✔ Gallium arsenide

15. KBr
- Potassium + Bromide → Potassium bromide
✔ Potassium bromide

16. KI
- Potassium + Iodide → Potassium iodide
✔ Potassium iodide

17. Li₂O
- Lithium + Oxide → Lithium oxide
✔ Lithium oxide

18. MgI₂
- Magnesium + Iodide → Magnesium iodide
✔ Magnesium iodide

19. MgS
- Magnesium + Sulfide → Magnesium sulfide
✔ Magnesium sulfide

20. Mn₂(SO₄)₃
- Manganese + Sulfate →
- SO₄²⁻ × 3 = 6– → two Mn atoms must total +6 → each Mn = +3
- Manganese(III) sulfate
✔ Manganese(III) sulfate

21. Na₂S
- Sodium + Sulfide → Sodium sulfide
✔ Sodium sulfide

22. Na₃N
- Sodium + Nitride → Sodium nitride
✔ Sodium nitride

23. NH₄Cl
- Ammonium + Chloride → Ammonium chloride
*(NH₄⁺ is a polyatomic cation)*
✔ Ammonium chloride

24. NiO
- Nickel + Oxide →
- O²⁻ → Ni must be +2
- Nickel(II) oxide
✔ Nickel(II) oxide

25. Pb(SO₄)₂
- Lead + Sulfate →
- SO₄²⁻ × 2 = 4– → Pb must be +4
- Lead(IV) sulfate
✔ Lead(IV) sulfate

26. PbCl₄
- Lead + Chloride →
- Cl⁻ × 4 = 4– → Pb = +4
- Lead(IV) chloride
✔ Lead(IV) chloride

27. PbS
- Lead + Sulfide →
- S²⁻ → Pb = +2
- Lead(II) sulfide
✔ Lead(II) sulfide

28. SnO₂
- Tin + Oxide →
- O²⁻ × 2 = 4– → Sn = +4
- Tin(IV) oxide
✔ Tin(IV) oxide

29. SnSe₂
- Tin + Selenide →
- Se²⁻ × 2 = 4– → Sn = +4
- Tin(IV) selenide
✔ Tin(IV) selenide

30. TiBr₃
- Titanium + Bromide →
- Br⁻ × 3 = 3– → Ti = +3
- Titanium(III) bromide
✔ Titanium(III) bromide

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✔ Final Answers:

1. Aluminum chloride
2. Aluminum cyanide
3. Aluminum oxide
4. Beryllium bicarbonate
5. Beryllium fluoride
6. Calcium fluoride
7. Calcium oxide
8. Copper(I) phosphide
9. Copper(II) chloride
10. Copper(I) iodide
11. Iron(III) nitrate
12. Iron(III) bromide
13. Iron(III) phosphide
14. Gallium arsenide
15. Potassium bromide
16. Potassium iodide
17. Lithium oxide
18. Magnesium iodide
19. Magnesium sulfide
20. Manganese(III) sulfate
21. Sodium sulfide
22. Sodium nitride
23. Ammonium chloride
24. Nickel(II) oxide
25. Lead(IV) sulfate
26. Lead(IV) chloride
27. Lead(II) sulfide
28. Tin(IV) oxide
29. Tin(IV) selenide
30. Titanium(III) bromide

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