Questions on Ternary Ionic Compounds – Naming and Formulas
20 Multiple-Choice Questions: Ternary Ionic Compounds – Naming and Formulas
Questions
1. What is the correct name for NaNO₃?
A) Sodium nitrate
B) Sodium nitrite
C) Sodium nitrogen
D) Sodium hydroxide
E) Sodium ammonium
2. What is the correct formula for calcium nitrate?
A) CaNO₃
B) Ca(NO₃)₂
C) Ca₂NO₃
D) Ca₂(NO₃)₂
E) CaNO₂
3. What is the name of K₂SO₄?
A) Potassium sulfite
B) Dipotassium sulfur
C) Potassium sulfate
D) Potassium bisulfate
E) Potassium sulfurate
4. What is the formula for ammonium sulfate?
A) NH₄₂SO₄
B) (NH₄)SO₄
C) (NH₄)₂SO₄
D) NH₄SO₄
E) (NH₃)₂SO₄
5. What is the name of Fe(OH)₃?
A) Iron(I) hydroxide
B) Iron(II) hydroxide
C) Iron(III) hydroxide
D) Iron hydride
E) Iron oxide
6. What is the correct name for Al₂(CO₃)₃?
A) Aluminum tricarbonate
B) Aluminum carbonite
C) Aluminum carbonate
D) Dialuminum carbonate
E) Aluminum oxide carbonate
7. What is the formula for magnesium phosphate?
A) MgPO₄
B) Mg₃PO₄
C) Mg₃(PO₄)₂
D) Mg₂(PO₄)₃
E) Mg(PO₄)₂
8. What is the correct name for Na₂CO₃?
A) Sodium bicarbonate
B) Sodium carbonate
C) Sodium hydroxide
D) Sodium carboxyl
E) Sodium dicarbonate
9. What is the formula for iron(II) nitrate?
A) FeNO₃
B) Fe(NO₃)₂
C) Fe₂(NO₃)₃
D) Fe₂NO₃
E) FeNO₂
10. What is the name of Ba(C₂H₃O₂)₂?
A) Barium ethanoate
B) Barium diacetate
C) Barium acetate
D) Barium oxalate
E) Barium acetoate
11. What is the formula for copper(I) sulfate?
A) CuSO₄
B) Cu₂SO₄
C) CuSO₃
D) Cu₂(SO₄)₃
E) Cu(SO₄)₂
12. What is the name of Sr(NO₂)₂?
A) Strontium nitrate
B) Strontium nitride
C) Strontium dinitride
D) Strontium nitrite
E) Strontium nitric
13. What is the formula for ammonium carbonate?
A) NH₄CO₃
B) NH₄₂CO₃
C) (NH₄)₂CO₃
D) (NH₃)₂CO₃
E) NH₄(CO₃)₂
14. What is the name of Ca(ClO₃)₂?
A) Calcium chlorite
B) Calcium perchlorate
C) Calcium hypochlorite
D) Calcium trichloride
E) Calcium chlorate
15. What is the formula for zinc phosphate?
A) ZnPO₄
B) Zn₃(PO₄)₂
C) Zn₂(PO₄)₃
D) Zn₂PO₄
E) Zn(PO₄)₃
16. What is the name of LiNO₂?
A) Lithium nitride
B) Lithium nitrate
C) Lithium nitrite
D) Lithium dinitride
E) Lithium nitrate(II)
17. What is the formula for aluminum sulfate?
A) AlSO₄
B) Al₂(SO₄)₃
C) Al₂(SO₃)₃
D) Al(SO₄)₃
E) Al₃SO₄₂
18. What is the name of Cu₂CO₃?
A) Copper(I) carbonate
B) Copper(II) carbonate
C) Copper bicarbonate
D) Dicopper carbonate
E) Copper(I) dicarbonate
19. What is the formula for potassium permanganate?
A) KMnO₄
B) K₂MnO₄
C) KMnO₃
D) K₂MnO₃
E) K(MnO₄)₂
20. What is the name of Ni₃(PO₄)₂?
A) Nickel phosphate
B) Nickel(II) phosphate
C) Nickel(III) phosphate
D) Trinickel phosphate
E) Nickel orthophosphate
Answers with Explanations
1. A) Sodium nitrate – Na⁺ and NO₃⁻ combine to form NaNO₃.
2. B) Ca(NO₃)₂ – Calcium (Ca²⁺) and nitrate (NO₃⁻) → two NO₃⁻ needed.
3. C) Potassium sulfate – K⁺ and SO₄²⁻ → K₂SO₄.
4. C) (NH₄)₂SO₄ – Ammonium (NH₄⁺) ×2 balances SO₄²⁻.
5. C) Iron(III) hydroxide – Fe³⁺ + 3OH⁻ → Fe(OH)₃.
6. C) Aluminum carbonate – Al³⁺ and CO₃²⁻ → Al₂(CO₃)₃.
7. C) Mg₃(PO₄)₂ – 3 Mg²⁺ and 2 PO₄³⁻ to balance charges.
8. B) Sodium carbonate – Na⁺ and CO₃²⁻ → Na₂CO₃.
9. B) Fe(NO₃)₂ – Fe²⁺ and NO₃⁻ ×2 → iron(II) nitrate.
10. C) Barium acetate – Ba²⁺ + 2 acetate (C₂H₃O₂⁻).
11. B) Cu₂SO₄ – 2 Cu⁺ needed to balance SO₄²⁻.
12. D) Strontium nitrite – Sr²⁺ and NO₂⁻ ×2 → Sr(NO₂)₂.
13. C) (NH₄)₂CO₃ – 2 NH₄⁺ to balance CO₃²⁻.
14. E) Calcium chlorate – Ca²⁺ and ClO₃⁻ ×2.
15. B) Zn₃(PO₄)₂ – Zn²⁺ and PO₄³⁻ → 3:2 ratio.
16. C) Lithium nitrite – Li⁺ and NO₂⁻.
17. B) Al₂(SO₄)₃ – 2 Al³⁺ and 3 SO₄²⁻.
18. A) Copper(I) carbonate – Cu⁺ and CO₃²⁻ → Cu₂CO₃.
19. A) KMnO₄ – Potassium permanganate.
20. B) Nickel(II) phosphate – 3 Ni²⁺ and 2 PO₄³⁻.
- Questions on Empirical Formula
- Questions on Molecular Formula
- Questions on Cations and Anions
- Chemistry Questions with Answers Key.
Practical Classroom Applications
• Introduce Polyatomic Ions
Teach students the structure and charges of common polyatomic ions such as nitrate, sulfate, carbonate, and phosphate.
• Create Reference Charts
Develop tables containing polyatomic ions and their formulas to reinforce memorization and pattern recognition.
• Practice Formula Writing
Have students translate compound names into chemical formulas and convert formulas back into names.
• Compare Binary and Ternary Ionic Compounds
Highlight the differences between simple ionic compounds and compounds containing polyatomic ions.
• Explore Environmental Applications
Discuss the role of nitrates, phosphates, and carbonates in water quality, agriculture, and ecosystems.
• Investigate Industrial Uses
Examine how ionic compounds are used in fertilizers, detergents, pharmaceuticals, and chemical manufacturing.
• Strengthen Chemical Vocabulary
Reinforce scientific terminology and nomenclature rules used in chemistry courses and laboratories.
• Prepare for Exams
Use the questions as review material for middle school, high school, AP Chemistry, and introductory college chemistry classes.
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