Electrolytes & Colligative Properties — Drills · Grade 11 Science
Chapter: Solutions & Dissolved ParticlesWhat these drills covers
By the end of Electrolytes & Colligative Properties you should be able to:
- I can distinguish molality from molarity and ions from neutral solute particles.
- I can calculate ideal phase-point changes and state the model’s limits.
2 questions, numeric and written answer, each with a worked explanation.
Vocabulary used: molality, particle factor i, osmosis.
Problem 1
Find molality of .30 mol solute in .60 kg solvent.
Hints
Write the relationship first; substitute with consistent units.
Answer and explanation
0.5 mol/kg
.30/.60=.50.
Problem 2
Why can dissolved sugar fail to conduct well?
Answer and explanation
Neutral sugar molecules do not supply many mobile ions.
Response criteria
- State a scientifically accurate conclusion.
- Show the calculation or mechanism that supports it.
- Include units, conditions, or limits where relevant.