Practice worksheet for naming ionic compounds and writing their chemical formulas.

Task: Naming Ionic Compounds Practice Worksheet

The worksheet involves two main sections:
1. Naming ionic compounds from their chemical formulas.
2. Writing the formulas for given names of ionic compounds.

Below is the solution with explanations for each part.

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Section 1: Naming Ionic Compounds

#### Rules for Naming Ionic Compounds:
1. Monatomic Cations (Positive Ions):
- Use the name of the metal as is (e.g., Na⁺ → Sodium).
- For transition metals with variable charges, use Roman numerals to specify the charge (e.g., Fe²⁺ → Iron(II)).

2. Monatomic Anions (Negative Ions):
- End with "-ide" (e.g., Cl⁻ → Chloride).

3. Polyatomic Ions:
- Use the specific name of the polyatomic ion (e.g., NO₃⁻ → Nitrate).

4. Ionic Compounds:
- Write the cation first, followed by the anion.
- Ensure the compound is electrically neutral.

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#### Solutions:

1. NH₄Cl
- NH₄⁺ is Ammonium.
- Cl⁻ is Chloride.
- Name: Ammonium Chloride

2. Fe(NO₃)₃
- Fe³⁺ is Iron(III).
- NO₃⁻ is Nitrate.
- Name: Iron(III) Nitrate

3. TiBr₃
- Ti³⁺ is Titanium(III).
- Br⁻ is Bromide.
- Name: Titanium(III) Bromide

4. Cu₃P
- Cu⁺ is Copper(I).
- P³⁻ is Phosphide.
- Name: Copper(I) Phosphide

5. SnSe₂
- Sn⁴⁺ is Tin(IV).
- Se²⁻ is Selenide.
- Name: Tin(IV) Selenide

6. GaAs
- Ga³⁺ is Gallium.
- As³⁻ is Arsenide.
- Name: Gallium Arsenide

7. Pb(SO₄)₂
- Pb²⁺ is Lead(II).
- SO₄²⁻ is Sulfate.
- Name: Lead(II) Sulfate

8. Be(HCO₃)₂
- Be²⁺ is Beryllium.
- HCO₃⁻ is Hydrogen Carbonate (Bicarbonate).
- Name: Beryllium Bicarbonate

9. Mn₂(SO₃)₃
- Mn³⁺ is Manganese(III).
- SO₃²⁻ is Sulfite.
- Name: Manganese(III) Sulfite

10. Al(CN)₃
- Al³⁺ is Aluminum.
- CN⁻ is Cyanide.
- Name: Aluminum Cyanide

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Section 2: Writing Formulas for Ionic Compounds

#### Rules for Writing Formulas:
1. Monatomic Ions:
- Use the periodic table to determine the charge of the ion.
- Balance the charges to ensure neutrality.

2. Polyatomic Ions:
- Use the known formula and charge of the polyatomic ion.

3. Transition Metals:
- Use Roman numerals to determine the charge of the metal ion.

4. Subscripts:
- Use parentheses and subscripts to balance charges when necessary.

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#### Solutions:

11. Chromium (VI) Phosphate
- Chromium(VI) = Cr⁶⁺
- Phosphate = PO₄³⁻
- To balance charges: \( \text{Cr}_2(\text{PO}_4)_3 \)
- Formula: Cr₂(PO₄)₃

12. Vanadium (IV) Carbonate
- Vanadium(IV) = V⁴⁺
- Carbonate = CO₃²⁻
- To balance charges: \( \text{V}_2(\text{CO}_3)_3 \)
- Formula: V₂(CO₃)₃

13. Tin (II) Nitrite
- Tin(II) = Sn²⁺
- Nitrite = NO₂⁻
- To balance charges: \( \text{Sn(NO}_2\text{)}_2 \)
- Formula: Sn(NO₂)₂

14. Cobalt (III) Oxide
- Cobalt(III) = Co³⁺
- Oxide = O²⁻
- To balance charges: \( \text{Co}_2\text{O}_3 \)
- Formula: Co₂O₃

15. Titanium (II) Acetate
- Titanium(II) = Ti²⁺
- Acetate = CH₃COO⁻
- To balance charges: \( \text{Ti}(\text{CH}_3\text{COO})_2 \)
- Formula: Ti(CH₃COO)₂

16. Vanadium (V) Sulfide
- Vanadium(V) = V⁵⁺
- Sulfide = S²⁻
- To balance charges: \( \text{V}_2\text{S}_5 \)
- Formula: V₂S₅

17. Chromium (III) Hydroxide
- Chromium(III) = Cr³⁺
- Hydroxide = OH⁻
- To balance charges: \( \text{Cr}(\text{OH})_3 \)
- Formula: Cr(OH)₃

18. Lithium Iodide
- Lithium = Li⁺
- Iodide = I⁻
- To balance charges: \( \text{LiI} \)
- Formula: LiI

19. Lead (II) Nitride
- Lead(II) = Pb²⁺
- Nitride = N³⁻
- To balance charges: \( \text{Pb}_3\text{N}_2 \)
- Formula: Pb₃N₂

20. Silver Bromide
- Silver = Ag⁺
- Bromide = Br⁻
- To balance charges: \( \text{AgBr} \)
- Formula: AgBr

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Final Answer:

1. Ammonium Chloride
2. Iron(III) Nitrate
3. Titanium(III) Bromide
4. Copper(I) Phosphide
5. Tin(IV) Selenide
6. Gallium Arsenide
7. Lead(II) Sulfate
8. Beryllium Bicarbonate
9. Manganese(III) Sulfite
10. Aluminum Cyanide

11. Cr₂(PO₄)₃
12. V₂(CO₃)₃
13. Sn(NO₂)₂
14. Co₂O₃
15. Ti(CH₃COO)₂
16. V₂S₅
17. Cr(OH)₃
18. LiI
19. Pb₃N₂
20. AgBr

Boxed Final Answer:
\[
\boxed{
\begin{array}{l}
\text{1. Ammonium Chloride} \\
\text{2. Iron(III) Nitrate} \\
\text{3. Titanium(III) Bromide} \\
\text{4. Copper(I) Phosphide} \\
\text{5. Tin(IV) Selenide} \\
\text{6. Gallium Arsenide} \\
\text{7. Lead(II) Sulfate} \\
\text{8. Beryllium Bicarbonate} \\
\text{9. Manganese(III) Sulfite} \\
\text{10. Aluminum Cyanide} \\
\text{11. Cr₂(PO₄)₃} \\
\text{12. V₂(CO₃)₃} \\
\text{13. Sn(NO₂)₂} \\
\text{14. Co₂O₃} \\
\text{15. Ti(CH₃COO)₂} \\
\text{16. V₂S₅} \\
\text{17. Cr(OH)₃} \\
\text{18. LiI} \\
\text{19. Pb₃N₂} \\
\text{20. AgBr}
\end{array}
}
\]