1) Identify the parts of a solution (solute and solvent).
2) Classify solvents: aqueous, tincture, amalgam, organic.
3) Be able to apply the statement "like dissolves like" to a real world situation.
4) Explain how factors (particle size, polarity, temperature, stirring) affect solubility.
4) Know what an alloy is and how it differs from a compound.
S O L U T I O N
(does the dissolving)
Solutions can be made from:
liquid : liquid
(e.g. lemon juice in water) solid : liquid
(sugar crystals dissolved in water)
gas : gas
(air: a solution of gases mixed evenly) gas : liquid
(carbon dioxide dissolved in pop)
(alloys - mixtures of metals (e.g. brass or pewter)
Solvents: aqueous - dissolved in water tincture - dissolved in alcohol amalgam
- dissolved in mercury
George Decker story (dental amalgam extraction)*Heavy Metal Poisoning
organic - dissolved in carbon containing solvent
Polar vs. Non-polar solvents
"like dissolves like"
Allow students to make Slime/Gluep polymer Envirobond - oil absorber Man turns blue from ingesting silver
Demo: (water, cyclohexane and glycerin) in test tube. Add 1
drop of food coloring.
Purple muscle, lycopodium powder, orbitz drink, separatory funnel
Demonstrations: oil and water with food coloring, emulsification, tincture of iodine.