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Practice Questions
Test your understanding with targeted questions related to the topic.
Question 1
Easy
Define molality.
💡 Hint: Think about how solute and solvent quantities are related.
Question 2
Easy
How would you convert grams of a solute to moles?
💡 Hint: Remember the formula: moles = mass/molar mass.
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 is molality?
- Moles of solute per liter of solution
- Moles of solute per kilogram of solvent
- Grams of solute per liter of solution
💡 Hint: Think about the unit of mass in the definition.
Question 2
True or False: Molality is influenced by temperature changes.
- True
- False
💡 Hint: Consider how temperature affects volume versus mass.
Solve 1 more question and get performance evaluation
Challenge Problems
Push your limits with challenges.
Question 1
A chemist dissolves 15 g of NaCl in 200 g of water. Determine the molality of the solution and discuss its importance.
💡 Hint: Use the molar mass of NaCl (about 58.5 g/mol) to find moles.
Question 2
A solution has a molality of 2.5 m when 100 grams of solute is added. Calculate the mass of the solvent in kg, and interpret why this value matters in boiling point elevation.
💡 Hint: Think about the colligative properties that change with more solute.
Challenge and get performance evaluation