Solved Naming Ionic Compounds Worksheet One Give the name of ... - Free Printable

Here is the complete solution for Naming Ionic Compounds Worksheet One, with explanations for each compound.

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Rules Recap:

- Ionic compounds are named by stating the cation (positive ion) first, then the anion (negative ion).
- For monatomic cations of metals that form only one ion (e.g., Na⁺, K⁺, Mg²⁺, Al³⁺), use the element name.
- For metals that form multiple ions (transition metals), use Roman numerals to indicate charge (e.g., Fe²⁺ = iron(II), Fe³⁺ = iron(III)).
- Polyatomic ions have specific names (e.g., CO₃²⁻ = carbonate, OH⁻ = hydroxide, SO₄²⁻ = sulfate).
- Ammonium (NH₄⁺) is a common polyatomic cation.
- For nonmetal anions, change the ending to “-ide” (e.g., Cl⁻ = chloride, O²⁻ = oxide).

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## ✔ Answers & Explanations:

1. Na₂CO₃ → Sodium carbonate
*Na⁺ is sodium; CO₃²⁻ is carbonate.*

2. NaOH → Sodium hydroxide
*Na⁺ + OH⁻ → sodium hydroxide.*

3. MgBr₂ → Magnesium bromide
*Mg²⁺ + Br⁻ → magnesium bromide (no Roman numeral needed — Mg has fixed 2+ charge).*

4. KCl → Potassium chloride
*K⁺ + Cl⁻ → potassium chloride.*

5. FeCl₂ → Iron(II) chloride
*Fe can be 2+ or 3+. Here, 2 Cl⁻ ions = total -2 charge → Fe must be 2+ → Iron(II).*

6. FeCl₃ → Iron(III) chloride
*3 Cl⁻ = -3 → Fe must be 3+ → Iron(III).*

7. Zn(OH)₂ → Zinc hydroxide
*Zn²⁺ + OH⁻ → zinc hydroxide. Zn has only one common ion (2+), so no Roman numeral.*

8. BeSO₄ → Beryllium sulfate
*Be²⁺ + SO₄²⁻ → beryllium sulfate.*

9. CrF₂ → Chromium(II) fluoride
*Cr is transition metal. 2 F⁻ = -2 → Cr is 2+ → Chromium(II).*

10. Al₂S₃ → Aluminum sulfide
*Al³⁺ + S²⁻ → aluminum sulfide (Al always 3+, no Roman numeral).*

11. PbO → Lead(II) oxide
*O²⁻ → Pb must be 2+ → Lead(II) oxide. (Pb can also be 4+)*

12. Li₃PO₄ → Lithium phosphate
*Li⁺ + PO₄³⁻ → lithium phosphate.*

13. TiI₄ → Titanium(IV) iodide
*4 I⁻ = -4 → Ti must be 4+ → Titanium(IV).*

14. Co₃N₂ → Cobalt(II) nitride
*N³⁻ → total anion charge = 2 × (-3) = -6. 3 Co ions → each must be 2+ → Cobalt(II).*

15. Mg₃P₂ → Magnesium phosphide
*Mg²⁺ + P³⁻ → magnesium phosphide (fixed charges).*

16. Ga(NO₂)₃ → Gallium nitrite
*Ga³⁺ + NO₂⁻ → gallium nitrite. (Note: NO₂⁻ is nitrite, not nitrate!)*

17. Ag₂SO₃ → Silver sulfite
*Ag⁺ + SO₃²⁻ → silver sulfite. (Ag is always 1+, no Roman numeral needed.)*

18. NH₄OH → Ammonium hydroxide
*NH₄⁺ + OH⁻ → ammonium hydroxide.*

19. Al(CN)₃ → Aluminum cyanide
*Al³⁺ + CN⁻ → aluminum cyanide.*

20. Be(CH₃COO)₂ → Beryllium acetate
*CH₃COO⁻ is acetate ion. Be²⁺ + 2 acetate → beryllium acetate.*

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## 📝 Final Answer Key:

1. Sodium carbonate
2. Sodium hydroxide
3. Magnesium bromide
4. Potassium chloride
5. Iron(II) chloride
6. Iron(III) chloride
7. Zinc hydroxide
8. Beryllium sulfate
9. Chromium(II) fluoride
10. Aluminum sulfide
11. Lead(II) oxide
12. Lithium phosphate
13. Titanium(IV) iodide
14. Cobalt(II) nitride
15. Magnesium phosphide
16. Gallium nitrite
17. Silver sulfite
18. Ammonium hydroxide
19. Aluminum cyanide
20. Beryllium acetate

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✔ All answers follow standard IUPAC naming rules for ionic compounds. Let me know if you’d like the reverse — writing formulas from names!