Colligative Properties

When considering colligative properties, the unit for concentration of solutes is molality. What is the SI unit?

• g / dm3

• g / kg

• mol / kg

• mol / dm3

The vapour pressure of a solvent is directly proportional to the amount of solute present in the mixture.

• True

• False

The Osmotic Pressure of a liquid is directly proportional to its concentration.

• True

• False

What is the molality of a solution containing 50g of NaCl and 400g of water?

• 125 mol/kg

• 0.125 mol/kg

• 0.00214 mol/kg

• 2.139 mol/kg

If 4.27g of sucrose (342.3g/mol) is dissolved in 15.2g of water, what is the boiling point of the resulting solution?

• 101.6 degrees Celsius

• 99.63 degrees Celsius

• 100.42 degrees Celsius

• 100.73 degrees Celsius

Tags

NGSS.HS-PS3-4