Description: Calcium Chloride is added to boiling water after the temperature is determined. Upon further heating, when the solution boils again, the boiling temperature is higher for pure water.

Source: Shakhashiri, B.Z. Chemical Demonstrations: A Handbook for Teachers of Chemistry

Year: 1989 Vol: 3 Page: 297

Keywords: Boiling point elevation, Colligative properties, Calcium Chloride, Vapor pressure

Rating:

Hazard: Medium

Burn hazard
Electric shock hazard
Scald hazard
Acute toxicity hazard
Skin corrosion hazard
Mild flammability hazard
Eye irritation

Effectiveness: Good

Good connection from demo to course material
High reliability
Time to results is medium
Secondary observations
Mild effects are seen by audience

Difficulty: Medium

Reagent addition in sequence
Demos at non-standard conditions
Demos in which a display is used
Simple procedures
Simple manipulations for most to perform

Safety Precautions:

Use of UL approved three-prong plug and outlet required
Eye protection is required
Thermal gloves are required
Absorbent materials on hand
Sodium bicarbonate on hand
ABC fire extinguisher on hand

Class: Intermolecular Forces, Properties of Solutions, Equilibrium of Chemical Systems

Division: General, Physical Chemistry

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