Naming Compounds Worksheet. - ppt download - Free Printable

Task: Naming Compounds

The worksheet involves two parts:
1. Part I: Names From Formulas – Convert chemical formulas into their corresponding names.
2. Part II: Formulas From Names – Convert compound names into their corresponding chemical formulas.

Let's solve each part step by step.

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## Part I: Names From Formulas

Rules for Naming Compounds:

- Ionic Compounds:
- The first element is named as is (metal or positive ion).
- The second element ends with "-ide".
- If the cation has multiple oxidation states, Roman numerals are used to specify the charge.
- Covalent Compounds:
- Prefixes are used to indicate the number of atoms of each element.
- The second element ends with "-ide".
- Acids:
- Binary acids: "hydro-" + element name + "-ic acid".
- Oxyacids: Based on the number of oxygen atoms and the anion name.

Solutions:

1. AgF₂
- Silver (Ag) is a metal, and fluorine (F) is a nonmetal.
- This is an ionic compound.
- Name: Silver(II) fluoride

2. AlBr₃
- Aluminum (Al) is a metal, and bromine (Br) is a nonmetal.
- This is an ionic compound.
- Name: Aluminum bromide

3. AuI₃
- Gold (Au) is a metal, and iodine (I) is a nonmetal.
- This is an ionic compound.
- Name: Gold(III) iodide

4. FeO
- Iron (Fe) is a metal with variable oxidation states, and oxygen (O) is a nonmetal.
- This is an ionic compound.
- Since iron can have different charges, we use Roman numerals.
- Name: Iron(II) oxide

5. BaI₂
- Barium (Ba) is a metal, and iodine (I) is a nonmetal.
- This is an ionic compound.
- Name: Barium iodide

6. BeO
- Beryllium (Be) is a metal, and oxygen (O) is a nonmetal.
- This is an ionic compound.
- Name: Beryllium oxide

7. Br₂O₅
- Bromine (Br) and oxygen (O) form a covalent compound.
- Use prefixes for the number of atoms.
- Name: Dibromine pentoxide

8. ClF
- Chlorine (Cl) and fluorine (F) form a binary covalent compound.
- Use prefixes for the number of atoms.
- Name: Chlorine monofluoride or Chlorine fluoride

9. H₃PO₄
- This is an oxyacid.
- The anion is phosphate (PO₄³⁻).
- Name: Phosphoric acid

10. Cu(NO₃)₂
- Copper (Cu) is a metal, and nitrate (NO₃⁻) is a polyatomic ion.
- This is an ionic compound.
- Name: Copper(II) nitrate

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## Part II: Formulas From Names

Rules for Writing Formulas:

- Ionic Compounds: Balance the charges of the ions to ensure electrical neutrality.
- Covalent Compounds: Use prefixes to indicate the number of atoms.
- Acids: Write the formula based on the anion name.

Solutions:

11. Aluminum oxide
- Aluminum (Al) has a +3 charge, and oxygen (O) has a -2 charge.
- To balance the charges: \( \text{Al}_2\text{O}_3 \)
- Formula: Al₂O₃

12. Aluminum nitride
- Aluminum (Al) has a +3 charge, and nitrogen (N) has a -3 charge.
- To balance the charges: \( \text{AlN} \)
- Formula: AlN

13. Gold (III) oxide
- Gold (Au) has a +3 charge, and oxygen (O) has a -2 charge.
- To balance the charges: \( \text{Au}_2\text{O}_3 \)
- Formula: Au₂O₃

14. Barium carbonate
- Barium (Ba) has a +2 charge, and carbonate (CO₃²⁻) has a -2 charge.
- To balance the charges: \( \text{BaCO}_3 \)
- Formula: BaCO₃

15. Beryllium acetate
- Beryllium (Be) has a +2 charge, and acetate (CH₃COO⁻) has a -1 charge.
- To balance the charges: \( \text{Be}(CH_3COO)_2 \)
- Formula: Be(CH₃COO)₂

16. Dicarbon tetrafluoride
- Prefixes indicate the number of atoms: 2 carbon atoms and 4 fluorine atoms.
- Formula: C₂F₄

17. Carbonic acid
- Carbonic acid corresponds to the anion carbonate (CO₃²⁻) with hydrogen atoms added.
- Formula: H₂CO₃

18. Hypochlorous acid
- Hypochlorous acid corresponds to the anion hypochlorite (ClO⁻) with one hydrogen atom.
- Formula: HClO

19. Calcium hydride
- Calcium (Ca) has a +2 charge, and hydrogen (H) has a -1 charge.
- To balance the charges: \( \text{CaH}_2 \)
- Formula: CaH₂

20. Carbon dioxide
- Prefixes indicate the number of atoms: 1 carbon atom and 2 oxygen atoms.
- Formula: CO₂

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## Final Answer

Part I: Names From Formulas

1. Silver(II) fluoride
2. Aluminum bromide
3. Gold(III) iodide
4. Iron(II) oxide
5. Barium iodide
6. Beryllium oxide
7. Dibromine pentoxide
8. Chlorine monofluoride or Chlorine fluoride
9. Phosphoric acid
10. Copper(II) nitrate

Part II: Formulas From Names

11. Al₂O₃
12. AlN
13. Au₂O₃
14. BaCO₃
15. Be(CH₃COO)₂
16. C₂F₄
17. H₂CO₃
18. HClO
19. CaH₂
20. CO₂

Boxed Final Answer:
\[
\boxed{
\begin{array}{ll}
\text{Part I:} & \text{Part II:} \\
1. \text{Silver(II) fluoride} & 11. \text{Al₂O₃} \\
2. \text{Aluminum bromide} & 12. \text{AlN} \\
3. \text{Gold(III) iodide} & 13. \text{Au₂O₃} \\
4. \text{Iron(II) oxide} & 14. \text{BaCO₃} \\
5. \text{Barium iodide} & 15. \text{Be(CH₃COO)₂} \\
6. \text{Beryllium oxide} & 16. \text{C₂F₄} \\
7. \text{Dibromine pentoxide} & 17. \text{H₂CO₃} \\
8. \text{Chlorine monofluoride} & 18. \text{HClO} \\
9. \text{Phosphoric acid} & 19. \text{CaH₂} \\
10. \text{Copper(II) nitrate} & 20. \text{CO₂} \\
\end{array}
}
\]