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Practice Questions
Test your understanding with targeted questions related to the topic.
Question 1
Easy
What is the formula for calculating molality?
💡 Hint: Think about what each part of the formula represents in terms of solute and solvent.
Question 2
Easy
If 2 moles of sugar are added to 1 kg of water, what is the molality?
💡 Hint: Remember to divide moles of solute by kg of solvent.
Practice 4 more questions and get performance evaluation
Interactive Quizzes
Engage in quick quizzes to reinforce what you've learned and check your comprehension.
Question 1
What does molality measure?
- Moles of solute per liter of solution
- Moles of solute per kilogram of solvent
- Ratio of solute to solvent mass
💡 Hint: Focus on what 'molality' stands for and how it relates to solution concentration.
Question 2
True or False: Molality is affected by changes in temperature.
- True
- False
💡 Hint: Consider how temperature affects mass versus volume.
Solve and get performance evaluation
Challenge Problems
Push your limits with challenges.
Question 1
A solution is prepared by dissolving 4.0 moles of NaCl into 2.0 kg of water. Calculate the molality of the solution and predict how this might affect its boiling point.
💡 Hint: Don’t forget to connect your molality to the boiling point elevation formula!
Question 2
You have a solution with 6.0 moles of a solute in 3.0 kg of water. If the solution exhibits a certain freezing point depression, explain how changing the solute to one with a higher van't Hoff factor would alter the freezing point.
💡 Hint: Remember that freezing point depression is dependent on the molality times the van’t Hoff factor.
Challenge and get performance evaluation