• Submitting Lab Data
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  • Automatic Grading of Reported Precision of Lab Data (Decimal Places)
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  • Automatic Grading of Accuracy and Precision of Lab Results
• Lab Practical / Snow Day / Lab Final
• Cheating

• Scientific Method
• Heat Capacity of a Styrofoam Calorimeter
• Colligative Properties

• Avogadro's Number
• Ordering Procedure Steps
• Graded Flowchart
• Dimensional Analysis Map
• Random Numbers as Sample Data
• Reading A Buret
• Thin-Layer Chromatography
• pH Calculator
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• Limiting Reagents
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• Properties of Solutions
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• Polarimeter

Colligative Properties of a Solution

A colligative property depends on the concentration of solute particles but not upon the identity of the solute. A solution containing a solute that cannot dissociate (i.e. Sucrose) will have a specific effect on the vapor pressure, boiling point, freezing point and osmotic pressure of the solution. A solution containing a solute that dissociates into two ions (i.e. NaCl) will have twice the effect on these solution properties. The solute CaCl₂ will have three times the effect . . . . the solute FeCl₃ will have four times the effect.

• For touchscreens, touch the hand icon to disable normal touch events.
• Select a solute.
• Move the concentraion slider to add a certain mass of the selected solute.
• Move the temperature slider to raise or lower the temperature of the solution.
• Note that the solution remains at the freezing temperature until frozen and then the temperature falls to the value entered.
• Also note that the solution remains at the boiling temperature until all the solvent is gone.
• The vapor pressure, freezing point, boiling point and osmotic pressure values listed are whole number approximations in the grey box - this allows you to re-create a solution described in a homework problem and use the numbers in the animation to "check your work."