Molar Mass and Colligative Properties

Molar Mass and Colligative Properties

Assessment

Interactive Video

Chemistry

10th - 12th Grade

Hard

Created by

Patricia Brown

FREE Resource

The video tutorial explains how to calculate the final boiling and freezing points of a solution after adding a solute. It begins with the initial conditions and explains the effect of solutes on vapor pressure, boiling, and freezing points. The tutorial then details the steps to calculate molality, molar mass, and moles of the solute. Finally, it applies these calculations to determine the changes in boiling and freezing points, providing a comprehensive understanding of the process.

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10 questions

Show all answers

1.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

What is the initial boiling point of water in the given problem?

50°C

100°C

150°C

0°C

2.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

What happens to the boiling point when a solute is added to a solvent?

It fluctuates

It increases

It remains the same

It decreases

3.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

Why is it necessary to find the molality before applying the boiling and freezing point formulas?

To determine the density

To find the temperature

To calculate the volume

To use it in the formulas

4.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

How is the molar mass of ethylene glycol calculated?

By subtracting atomic masses of its atoms

By multiplying its density by volume

By dividing its mass by volume

By adding atomic masses of its atoms

5.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

What is the molar mass of ethylene glycol used in the problem?

44 g/mol

62 g/mol

18 g/mol

100 g/mol

6.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

How do you convert milliliters of water to kilograms?

Subtract 1000

Add 1000

Multiply by 1000

Divide by 1000

7.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

What is the molality of the solution calculated in the problem?

1.0 mol/kg

0.71 mol/kg

1.5 mol/kg

0.5 mol/kg

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