SI Exam Review

Molality (m) = moles of solute / _________________________.

• 
  kilogram of solvent

• 
  kiloliter of solvent

• 
  kilometer of solvent

• ounces of solvent

Which sweet tea would you expect to taste the sweetest?

• 1M

• 
  3M

• 3.1M

• 2.5M

Molarity is measured in _

• moles per g

• moles per mm

• mols per L

• moles per mL

What is the molality of a solution in which 3.0 moles of NaCl is dissolved in 1.5 Kg of water?

• 2.0m

• 0.22 m

• 
  135 m

• 2.0 M

How many moles of NaCl are present in a solution with a molarity of 8.59 M and a volume of 125 mL?

• 
  0.069 mol

• 1074 mol

• 1.07 mol

• 
  62.7 mol

What is the molarity of 4 g of NaCl (MM=58.45) in 3,800 mL of solution?

• 
  0.018 m

• 1.052 M

• 
  0.018 M

• 1.052 m

What is the mole fraction of MgF₂ in a solution that has 0.321 mol of MgF₂ dissolved in 4.44 mol of water?

• 
  0.0256

• 
  0.0722

• 
  0.0674

• 1.425

The solubility of CO2 in a solution is 0.003 M at 2 atm. What is the solubility of CO2 at 6 atm if the temperature remains constant?

• 0.9

• 0.09

• 0.009

• 0.0009

The solubility of a gas is 2.1 x 10^-4 mol/L at 345 torr. To increase the gas solubility to 4.5 x 10^-4 mol/L, what should be the partial pressure of the gas above the solution.

• 739.3 torr

• 7393 torr

• 739.3 atm

• 73.93 torr

20 g of NaOH was dissolved in 200g of water. Calculate the boiling point of the solution. The Kb for water is 0.51

• 102.55 °C

• 10 °C

• 101.45 °C

• 106.65 °C