Solubility Rules Quiz
Questions: 16 · 10 minutes
1. Aqueous lead(II) nitrate is mixed with aqueous potassium iodide. Which compound forms the precipitate?
Potassium nitrate, KNO₃
Lead(II) nitrate, Pb(NO₃)₂
Lead(II) iodide, PbI₂
Potassium iodide, KI
2. Which statement best summarizes the solubility rule for salts containing alkali-metal ions such as Na⁺ or K⁺?
They are soluble only when paired with nitrate
Their carbonates and phosphates are generally insoluble
They are generally soluble with common anions
They follow the same insolubility patterns as most transition-metal salts
3. Sodium sulfate solution is added separately to barium nitrate and magnesium nitrate solutions. Which result is expected?
A precipitate forms in both solutions
No precipitate forms in either solution
A precipitate forms with magnesium nitrate only
A precipitate forms with barium nitrate only
4. Aqueous iron(III) chloride is mixed with aqueous sodium hydroxide. Which product is expected to precipitate?
Iron(III) hydroxide, Fe(OH)₃
Sodium chloride, NaCl
Iron(III) chloride, FeCl₃
No product, because both possible products remain soluble
5. Potassium carbonate solution is added to calcium chloride solution. Which substance is expected to form a precipitate?
Potassium chloride, KCl
Calcium carbonate, CaCO₃
Potassium carbonate, K₂CO₃
No substance; all possible products remain dissolved
6. Which phosphate is expected to be soluble because of a major cation exception?
Aluminum phosphate, AlPO₄
Calcium phosphate, Ca₃(PO₄)₂
Iron(III) phosphate, FePO₄
Ammonium phosphate, (NH₄)₃PO₄
7. Aqueous silver nitrate is mixed with aqueous sodium chloride. What is the expected observation?
No precipitate forms
Silver nitrate forms a precipitate
Sodium nitrate forms a precipitate
Silver chloride forms a precipitate
8. Aqueous barium chloride and sodium sulfate are combined. Which product precipitates?
Barium sulfate, BaSO₄
Barium chloride, BaCl₂
Sodium chloride, NaCl
No product precipitates
9. Magnesium carbonate is replaced by magnesium nitrate in a solubility comparison. Which conclusion follows from the usual rules?
Both compounds are expected to be insoluble
Both compounds are expected to be soluble
Magnesium nitrate is soluble, while magnesium carbonate is insoluble
Magnesium carbonate is soluble, but magnesium nitrate is insoluble
10. Which chloride is a common exception to the rule that most chlorides are soluble?
Sodium chloride, NaCl
Ammonium chloride, NH₄Cl
Magnesium chloride, MgCl₂
Silver chloride, AgCl
11. Which sulfate is expected to be insoluble in water?
Barium sulfate, BaSO₄
Potassium sulfate, K₂SO₄
Ammonium sulfate, (NH₄)₂SO₄
Sodium sulfate, Na₂SO₄
12. Solutions of sodium nitrate and potassium chloride are mixed. What is the expected result?
No precipitate forms because all possible products are soluble
Potassium nitrate precipitates
Both possible products precipitate
Sodium chloride precipitates
13. Which anion generally makes its ionic compounds soluble in water?
Carbonate, CO₃²⁻
Nitrate, NO₃⁻
Phosphate, PO₄³⁻
Hydroxide, OH⁻
14. In the reaction between AgNO₃(aq) and NaCl(aq), which ions remain unchanged as spectator ions?
Ag⁺ and Cl⁻
Na⁺ and NO₃⁻
Ag⁺ and NO₃⁻
Na⁺ and Cl⁻
15. Calcium chloride and sodium carbonate solutions react to form calcium carbonate. Which is the correct net ionic equation?
Ca²⁺(aq) + 2Cl⁻(aq) → CaCl₂(s)
2Na⁺(aq) + CO₃²⁻(aq) → Na₂CO₃(s)
Ca²⁺(aq) + CO₃²⁻(aq) → CaCO₃(s)
Ca²⁺(aq) + CO₃²⁻(aq) → CaCO₃(aq)
16. Which carbonate is expected to be soluble under standard classroom solubility rules?
Calcium carbonate, CaCO₃
Ammonium carbonate, (NH₄)₂CO₃
Copper(II) carbonate, CuCO₃
Iron(II) carbonate, FeCO₃