Solubilityquiz #1 Solubility and Saturated Solutions

SolubilityQuiz #1 Solubility and Saturated Solutions

1. To determine the solubility of solute in water, a solution must be prepared that is:

A. saturated

B. unsaturated

C. concentrated

D. supersaturated

2. From the list of salts below, how many are considered soluble at 25oC?

CuCl2CaSO4PbSAg3PO4

A. zero

B. one

C. two

D. three

3. Which one of the following equilibrium systems is described by Ksp?

A.CaCO3(s) ⇄ CaO(s) + CO2(g)

B. CaCO3(s) ⇄ Ca2+(aq) + CO2-3(aq)

C. Ca 2+(aq) + CO2-3(aq)⇄ CaCO3(s)

D. Ca(OH)2(aq) + H2CO3(aq) ⇄ CaCO3(s) + 2H2O(l)

4. In a saturated solution, the rate of dissolving is

A. equal to zero

B. equal to the rate of crystallization

C. less than the rate of crystallization

D. greater than the rate of crystallization

5. A soluble magnesium salt is

A. MgSO3

B. MgCO3

C. Mg(NO3)2

D. Mg3(PO4)2

6. The equation that represents the equilibrium in a saturated solution of Fe2(SO4)3 is

A. Fe2(SO4)3(s)⇄ 3Fe2+(aq) + 2SO43-(aq)

B. Fe2(SO4)3(s)⇄ 2Fe2+(aq) + 3SO43-(aq)

C. Fe2(SO4)3(s)⇄ 3Fe3+(aq) + 2SO42-(aq)

D. Fe2(SO4)3(s)⇄ 2Fe3+(aq) + 3SO42-(aq)

7. Which one of the following salts is soluble?

A. BaSO4

B. CaCO3

C. K3PO4

D. Fe(OH)2

8. The equation representing the equilibrium in a saturatedsolution of CaSO4 is

A. CaSO4(s) ⇄ Ca2+(aq) + SO42-(aq)

B. CaSO4(s) ⇄ Ca2+(aq) + S2-(aq) + 4O2-(aq)

C. CaSO4(s) + H2O(l) ⇄ CaO(aq) + H2SO4(aq)

D. CaSO4(s) + 2H2O(l) ⇄ Ca(OH)2(aq) + H2SO4(aq)

9. Which of the following units is commonly used to describe solubility?

A. mL/s

B. g/oC

C. mol/L

D. oC/mol

10. Which of the following represents the equilibrium in a saturated solution of Cr2(SO4)3

A. Cr2(SO4)3(s) ⇄ Cr2+(aq) + SO43-(aq)

B. Cr2(SO4)3(s) ⇄ Cr3+(aq) + SO42-(aq)

C. Cr2(SO4)3(s) ⇄ 2Cr2+(aq) + 3SO43-(aq)

D. Cr2(SO4)3(s) ⇄ 2Cr3+(aq) + 3SO42-(aq)