Physical Properties

Boiling Cold Water

Water boils at room temperature when pressure is reduced by using a vacuum pump.
Boiling Cold Water

Viscosity

A small metal ball falls much more slowly through glycerine than through water.
Viscosity Setup

Properties of Two Ionic Salts (Crystals): Halite and Calcite

When a large halite crystal, NaCl(s), is struck with a hammer, it cleaves evenly, 90° straight edges. When a large calcite crystal, CaCO3(s), is struck with a hammer, it cleaves at a slant angle. A crystal of halite, sodium chloride, does not conduct, but when it is pulverized and dissolved it does conduct. A crystal of calcite, calcium carbonate, when placed in water does not dissolve.
Why ionic compounds crack Demo Setup Image853

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© Copyright 2012 Email: Randy Sullivan, University of Oregon Chemistry Department and UO Libraries Interactive Media Group