Using Colligative Properties to Determine Molar Mass


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question 1 of 3

Which of the following is the best definition of a colligative property?

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1. Which of the following is NOT an example of a colligative property?

2. MgCl2 and NaCl are both salts that are used to treat roads. Which salt will have the greatest effect on the freezing point and why?

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About This Quiz & Worksheet

These assessments test your comprehension of finding the molar mass of unknown substances in solutions using colligative properties of solutes. You will be quizzed on your knowledge of this property of solutions as well as your understanding of the terms molal, nonvolatile substance and freezing point depression.

Quiz & Worksheet Goals

Use this printable worksheet and quiz to review these topics:

  • Colligative properties
  • Molal freezing-point constant
  • Nonvolatile substance
  • Freezing point depression

Skills Practiced

  • Defining key concepts - accurately define and grasp main terms like molal freezing-point constant and freezing point depression
  • Knowledge application - assess how a colligative property can used to find the molar mass of a substance in an unknown solute
  • Problem solving - use acquired knowledge to solve for the molar mass in practice problems

Additional Learning

To review concepts related to colligative properties, read through the brief lesson called Using Colligative Properties to Determine Molar Mass. This lesson will help you:

  • Explain how vapor pressure and osmotic pressure are colligative properties
  • Learn the equation for determining osmotic pressure
  • Define Raoult's Law on vapor pressure
  • Describe nonvolatile solutes affect vapor pressure
  • Understand how to use osmotic pressure to determine the molar mass of a substance