Educational worksheet teaching naming conventions for chemical compounds using a flowchart.
Worksheet titled "Naming: Prefixing is All Together" showing a flowchart for naming compounds and a list of compounds to name using the flowchart.
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Step-by-step solution for: Naming: Putting it all Together Worksheet for 9th - 12th Grade ...
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Show Answer Key & Explanations
Step-by-step solution for: Naming: Putting it all Together Worksheet for 9th - 12th Grade ...
Let’s work through this step by step.
The task is to use a “Naming Flow Chart” (which we can’t see, but we know how these usually work) to name each compound. The key is to first figure out if the compound is:
- Ionic (metal + nonmetal or polyatomic ions)
- Covalent (nonmetal + nonmetal)
- Acid (starts with H and is in aqueous solution)
Then follow the flow chart rules to name it correctly.
We’ll go one by one.
---
1. FeCl₃
- Iron (Fe) is a metal that can have multiple charges → transition metal.
- Chlorine (Cl) is a nonmetal → forms chloride ion (Cl⁻).
- Since there are 3 Cl⁻ ions, total negative charge = -3.
- So Fe must be +3 → Iron(III).
- Name: Iron(III) chloride
---
2. P₂O₅
- Both phosphorus (P) and oxygen (O) are nonmetals → covalent compound.
- Use prefixes: di- for 2 P, pent- for 5 O.
- Second element ends in “-ide” → oxide.
- Name: Diphosphorus pentoxide
*(Note: Sometimes written as “phosphorus pentoxide”, but since the formula shows P₂, we use “di”)*
---
3. Na₂SO₄
- Sodium (Na) is a metal (Group 1, always +1).
- SO₄ is sulfate ion (polyatomic ion, charge -2).
- Two Na⁺ balance one SO₄²⁻ → neutral.
- Name: Sodium sulfate
---
4. HNO₃(aq)
- Starts with H → acid.
- NO₃⁻ is nitrate ion.
- For acids: if anion ends in “-ate”, acid name ends in “-ic acid”.
- So: Nitric acid
---
5. CaBr₂
- Calcium (Ca) is a metal (Group 2, always +2).
- Bromine (Br) is nonmetal → bromide ion (Br⁻).
- Two Br⁻ balance Ca²⁺.
- Name: Calcium bromide
---
6. N₂O₄
- Both nonmetals → covalent.
- Prefixes: di- for 2 N, tetra- for 4 O.
- Second element: oxide.
- Name: Dinitrogen tetroxide
---
7. Al(C₂H₃O₂)₃
- Aluminum (Al) is a metal (always +3).
- C₂H₃O₂⁻ is acetate ion (polyatomic).
- Three acetate ions balance Al³⁺.
- Name: Aluminum acetate
---
8. HCl(aq)
- Acid (H + Cl).
- Cl⁻ is chloride → acid name: hydro- + root + -ic acid.
- So: Hydrochloric acid
---
9. SnO₂
- Tin (Sn) is a transition metal (can have multiple charges).
- Oxygen is O²⁻ → two oxygens = -4 total.
- So Sn must be +4 → Tin(IV).
- Name: Tin(IV) oxide
---
10. CO₂
- Carbon and oxygen → both nonmetals → covalent.
- Prefixes: mono- for C (usually omitted), di- for O.
- Name: Carbon dioxide
---
11. K₂S
- Potassium (K) is Group 1 metal → always +1.
- Sulfur (S) → sulfide ion (S²⁻).
- Two K⁺ balance S²⁻.
- Name: Potassium sulfide
---
12. H₂SO₄(aq)
- Acid.
- SO₄²⁻ is sulfate → acid name: sulfuric acid.
- Name: Sulfuric acid
---
13. CuCl₂
- Copper (Cu) is transition metal → variable charge.
- Two Cl⁻ = -2 → Cu must be +2 → Copper(II).
- Name: Copper(II) chloride
---
14. (NH₄)₃PO₄
- NH₄⁺ is ammonium (polyatomic cation).
- PO₄³⁻ is phosphate (polyatomic anion).
- Three ammonium ions balance one phosphate.
- Name: Ammonium phosphate
---
15. XeF₄
- Xenon and fluorine → both nonmetals → covalent.
- Prefixes: mono- for Xe (omitted), tetra- for F.
- Name: Xenon tetrafluoride
---
16. Ba(OH)₂
- Barium (Ba) is Group 2 metal → always +2.
- OH⁻ is hydroxide (polyatomic ion).
- Two OH⁻ balance Ba²⁺.
- Name: Barium hydroxide
---
17. AgNO₃
- Silver (Ag) is a metal — often considered to have fixed +1 charge in naming (though technically variable, in intro chem it’s treated as +1).
- NO₃⁻ is nitrate.
- Name: Silver nitrate
---
18. H₃PO₄(aq)
- Acid.
- PO₄³⁻ is phosphate → acid name: phosphoric acid.
- Name: Phosphoric acid
---
19. CaO
- Calcium (metal) + oxygen (nonmetal) → ionic.
- O²⁻ → oxide.
- Name: Calcium oxide
---
20. CCl₄
- Carbon and chlorine → both nonmetals → covalent.
- Prefixes: mono- for C (omitted), tetra- for Cl.
- Name: Carbon tetrachloride
---
✔ All compounds named correctly based on standard IUPAC naming rules for ionic, covalent, and acid compounds.
Final Answer:
1. Iron(III) chloride
2. Diphosphorus pentoxide
3. Sodium sulfate
4. Nitric acid
5. Calcium bromide
6. Dinitrogen tetroxide
7. Aluminum acetate
8. Hydrochloric acid
9. Tin(IV) oxide
10. Carbon dioxide
11. Potassium sulfide
12. Sulfuric acid
13. Copper(II) chloride
14. Ammonium phosphate
15. Xenon tetrafluoride
16. Barium hydroxide
17. Silver nitrate
18. Phosphoric acid
19. Calcium oxide
20. Carbon tetrachloride
The task is to use a “Naming Flow Chart” (which we can’t see, but we know how these usually work) to name each compound. The key is to first figure out if the compound is:
- Ionic (metal + nonmetal or polyatomic ions)
- Covalent (nonmetal + nonmetal)
- Acid (starts with H and is in aqueous solution)
Then follow the flow chart rules to name it correctly.
We’ll go one by one.
---
1. FeCl₃
- Iron (Fe) is a metal that can have multiple charges → transition metal.
- Chlorine (Cl) is a nonmetal → forms chloride ion (Cl⁻).
- Since there are 3 Cl⁻ ions, total negative charge = -3.
- So Fe must be +3 → Iron(III).
- Name: Iron(III) chloride
---
2. P₂O₅
- Both phosphorus (P) and oxygen (O) are nonmetals → covalent compound.
- Use prefixes: di- for 2 P, pent- for 5 O.
- Second element ends in “-ide” → oxide.
- Name: Diphosphorus pentoxide
*(Note: Sometimes written as “phosphorus pentoxide”, but since the formula shows P₂, we use “di”)*
---
3. Na₂SO₄
- Sodium (Na) is a metal (Group 1, always +1).
- SO₄ is sulfate ion (polyatomic ion, charge -2).
- Two Na⁺ balance one SO₄²⁻ → neutral.
- Name: Sodium sulfate
---
4. HNO₃(aq)
- Starts with H → acid.
- NO₃⁻ is nitrate ion.
- For acids: if anion ends in “-ate”, acid name ends in “-ic acid”.
- So: Nitric acid
---
5. CaBr₂
- Calcium (Ca) is a metal (Group 2, always +2).
- Bromine (Br) is nonmetal → bromide ion (Br⁻).
- Two Br⁻ balance Ca²⁺.
- Name: Calcium bromide
---
6. N₂O₄
- Both nonmetals → covalent.
- Prefixes: di- for 2 N, tetra- for 4 O.
- Second element: oxide.
- Name: Dinitrogen tetroxide
---
7. Al(C₂H₃O₂)₃
- Aluminum (Al) is a metal (always +3).
- C₂H₃O₂⁻ is acetate ion (polyatomic).
- Three acetate ions balance Al³⁺.
- Name: Aluminum acetate
---
8. HCl(aq)
- Acid (H + Cl).
- Cl⁻ is chloride → acid name: hydro- + root + -ic acid.
- So: Hydrochloric acid
---
9. SnO₂
- Tin (Sn) is a transition metal (can have multiple charges).
- Oxygen is O²⁻ → two oxygens = -4 total.
- So Sn must be +4 → Tin(IV).
- Name: Tin(IV) oxide
---
10. CO₂
- Carbon and oxygen → both nonmetals → covalent.
- Prefixes: mono- for C (usually omitted), di- for O.
- Name: Carbon dioxide
---
11. K₂S
- Potassium (K) is Group 1 metal → always +1.
- Sulfur (S) → sulfide ion (S²⁻).
- Two K⁺ balance S²⁻.
- Name: Potassium sulfide
---
12. H₂SO₄(aq)
- Acid.
- SO₄²⁻ is sulfate → acid name: sulfuric acid.
- Name: Sulfuric acid
---
13. CuCl₂
- Copper (Cu) is transition metal → variable charge.
- Two Cl⁻ = -2 → Cu must be +2 → Copper(II).
- Name: Copper(II) chloride
---
14. (NH₄)₃PO₄
- NH₄⁺ is ammonium (polyatomic cation).
- PO₄³⁻ is phosphate (polyatomic anion).
- Three ammonium ions balance one phosphate.
- Name: Ammonium phosphate
---
15. XeF₄
- Xenon and fluorine → both nonmetals → covalent.
- Prefixes: mono- for Xe (omitted), tetra- for F.
- Name: Xenon tetrafluoride
---
16. Ba(OH)₂
- Barium (Ba) is Group 2 metal → always +2.
- OH⁻ is hydroxide (polyatomic ion).
- Two OH⁻ balance Ba²⁺.
- Name: Barium hydroxide
---
17. AgNO₃
- Silver (Ag) is a metal — often considered to have fixed +1 charge in naming (though technically variable, in intro chem it’s treated as +1).
- NO₃⁻ is nitrate.
- Name: Silver nitrate
---
18. H₃PO₄(aq)
- Acid.
- PO₄³⁻ is phosphate → acid name: phosphoric acid.
- Name: Phosphoric acid
---
19. CaO
- Calcium (metal) + oxygen (nonmetal) → ionic.
- O²⁻ → oxide.
- Name: Calcium oxide
---
20. CCl₄
- Carbon and chlorine → both nonmetals → covalent.
- Prefixes: mono- for C (omitted), tetra- for Cl.
- Name: Carbon tetrachloride
---
✔ All compounds named correctly based on standard IUPAC naming rules for ionic, covalent, and acid compounds.
Final Answer:
1. Iron(III) chloride
2. Diphosphorus pentoxide
3. Sodium sulfate
4. Nitric acid
5. Calcium bromide
6. Dinitrogen tetroxide
7. Aluminum acetate
8. Hydrochloric acid
9. Tin(IV) oxide
10. Carbon dioxide
11. Potassium sulfide
12. Sulfuric acid
13. Copper(II) chloride
14. Ammonium phosphate
15. Xenon tetrafluoride
16. Barium hydroxide
17. Silver nitrate
18. Phosphoric acid
19. Calcium oxide
20. Carbon tetrachloride
Parent Tip: Review the logic above to help your child master the concept of putting it all together worksheet.
