Chemistry Ch 13 - 15 practice test

What volume of 0.112 M Pb(NO₃)₂ is required to fully react with 60.0 mL of 0.140 M KI? Given: Pb(NO₃)₂(aq) + 2 KI (aq) → PbI₂ (s) + 2 KNO₃ (aq)

• 37.5 mL

• 75.0 mL

• 18.8 mL

• 150.0 mL

Which of the following actions will generally decrease the solubility of a gas in a liquid?

• Raising the pressure of the gas above the liquid

• Raising the temperature of the liquid

• Lowering the temperature of the liquid

• Increasing the polarity of the gas

What is the mass percentage concentration of a solution containing 45.0 g of sugar and 200.0 mL of water? (Write only the numbers, no units. water density = 1.00 g/mL)

How many grams of K₂S are present in 425 mL of a 1.25 M K₂S solution?

A 80.0 g sample of NaCl is dissolved in water and the solution is diluted to give a final volume of 35.0 liters. The molarity of the final solution is?

• 1.00 M

• 0.250 M

• 0.0391 M

• 2.25 M

A solution is 0.20 M in Na₂SO₄. What is the concentration of Na⁺ in the solution?

Which solution will have the highest boiling point?

• 1.0 m ethylene glycol

• 1.5 m ethylene glycol

• 0.50 m ethylene glycol

• all the solutions will have the same boiling point

What volume of 5.00 M HNO₃ is needed to make 7.00 L of a 1.25 M solution?

• 28.0 mL

• 28.0 L

• 1.12 L

• 1.75 L

• 175 mL

What is the concentration of a solution obtained by diluting 60.0 mL of 4.00 M HCl to 2.00 L?

• 0.120 M

• 0.200 M

• 0.300 M

• 0.400 M

Which of the following compounds is expected to have the lowest solubility in water?

• CH₃OH

• H₂O

• NaCl

• C₆H₆