Sub-category	Demo Name	Brief Description	Demo Notes	Demo #	Type of Item
Colligative Properties of Solutions	Osmotic pressure of a sugar solution	Regular:  put dark or colored corn syrup in thistle tube and put a soaked membrane over the end using twist ties.  Hook it onto a ring stand and into a beaker of water to observe the solution going up in the tube with time.  (See variations in details.)	Also on Shakhashiri tape III #42.  Small scale:  uses a copper sulfate solution where you add crystals of sodium hexacyanoferrate(II) and a brown semipermeable membrane is formed, water enters the membrane, it swells, bursts, throws out the concentrated sodium hexacyanoferrate(II) solution, which reacts with copper in solution to make more copper hexacyanoferrate(II), making solid brown streamers and membranes.  It is done on the overhead and looks like growing sea grass.  I tried it out and it grew 1/2 inch in 5 minutes.  I couldn't really see the membranes bursting and they are small balls, but it looked kind of neat anyway.	76	Demonstration
Colligative Properties of Solutions	Colligative Properties - melting points	watch glasses on an overhead or beakers contain ice or ice that had salt poured on it to show the different melting rates		100	Demonstration
Colligative Properties of Solutions	sugar, diet coke	A coke can is opened and heated to evaporate the water leaving the sugary residue.		150	Demonstration
Colligative Properties of Solutions	Osmotic pressure of a sugar solution		Shakhashiri tape III #42.	M58	Movie
Colloids	Formation of a colloid	Sterno-alcohol gel; thixotropy, dilatancy.  Liquids are mixed to give a gel which can be lighted		38	Demonstration
Colloids	Tyndal effect-chemical sunset on overhead projector	Na thiosulfate and HCl; disproportionation.  Can be tricky.  A cardboard sheet containing a small hole is placed on the overhead projector.  A solution is added to beaker containing a different solution which changes the color of the light projected to resemble a sun set.		65	Demonstration
Colloids	Cuprammonium rayon			118	Demonstration
Dissolution Processes	Solubility, polar and nonpolar solvents	water, toluene, NaCl, naphthalene; Solubility of solids in liquids, temperature.  Add the two solids to 4 beakers of the solvents to see what dissolves in what.  Do not add too much solid or all won't dissolve.  Solubility of a limestone rock in 1M HCl, salt in water.		109	Demonstration
Electrolytes and Non-Electrolytes	Electrical conductivity of liquids	Light bulb with H2O, acetic acid, K2CrO4.  A beaker is covered with a Petri plate lid containing the 2 copper electrodes.  The electrodes are immersed into assorted solutions to test whether they light a bulb, and how brightly.		56	Demonstration
Rates of Dissolution and Saturation	Supersaturation-sodium acetate crystallization	A supersaturated solution of sodium acetate is in a long glass tube.  A single solid crystal causes the solution to solidify.  OR pour the solution onto a surface containing a crystal and the solution forms a stalagmite.	Also see 163 for other crystals, and 146 for other exothermic reactions.  Also on Shakhashiri tape III #41; Close up on Chemistry Ealy 1:19 (1:21 min)	106	Demonstration
Rates of Dissolution and Saturation	Crystal formations	Saturated solutions form crystals, several variations including waterglass.	Chemical garden, microcrystals, sugar and salt, other crystal formations	163	Demonstration
Rates of Dissolution and Saturation	Supersaturation-sodium acetate crystallization	A supersaturated solution of sodium acetate is in a long glass tube.  A single solid crystal causes the solution to solidify.  OR pour the solution onto a surface containing a crystal and the solution forms a stalagmite.	Shakhashiri tape III #41; Close up on Chemistry Ealy 1:19 (1:21 min)  (For Ealy set timer to zero when first text rolls on screen.)	M36	Movie
Solubility rules	Disappearing ink, invisible writing, Goldenrod messages	EtOH, thymolphthalein, NaOH;  The wet ink looks dark blue but it quickly becomes colorless on paper.  Various invisible inks are made for signs, etc.  Some brands of Goldenrod colored copy paper turn red when sprayed with household ammonia (write first with white wax or invisible tape)		53	Demonstration
	Solubility of a gas: Ammonia fountain	dissolves in water, water fills up inverted flask	Tricky to set up, but it works--unknown if students liked it much.  Also on Shakhashiri tape 1 #3,4,6; Close up on Chemistry Ealy 16:04 (2 min)	33	Demonstration
	Solubility of a gas: Ammonia fountain	dissolves in water, water fills up inverted flask	Shakhashiri tape 1 #3,4,6	M10	Movie
	Solubility of a gas: Ammonia fountain	dissolves in water, water fills up inverted flask	Close up on Chemistry Ealy 16:04 (2 min)  (Set timer to zero when first text rolls on screen.)	M11	Movie
Electrolytes and Non-Electrolytes	Plastic Easter eggs as models for dissociation			107	Demonstration
Electrolytes and Non-Electrolytes	glowing electric pickle-UT, the eyes of Texas are upon you	UT is spelled out on a plastic grid using specially wired pickles.  The wires are plugged in causing the pickles to glow yellow orange.  A smaller version uses a single pickle stuck on nails of a board.	The small version can be available routinely, but the larger version takes a longer prep time-at least 1 hour.  Can have class sing the eyes of Texas while UT pickle glowing.	135	Demonstration
Solubility rules	Limiting reactant concept (PbCrO4)	Potassium chromate and lead nitrate give a thick yellow precipitate.  One reactant is diluted  to show the ppt decreases.	Also illustrated by Dr. Laude using 6 bolts, 4 nuts, 12 washers on an overhead projector  (See demo #152)	2	Demonstration
Solubility rules	Precipitation reactions	various 2 clear solutions are mixed to give different colored precipitates.  K2CrO4 + Pb(NO3)2 for yellow, (NH4)2CO3 + CaCl2 for white.  The barium hydroxide/sulfuric acid ppt can be used with phenolphthalene to show an acid/base ppt.	Very popular-The potassium chromate, lead nitrate reaction gives a thick yellow ppt.    (Also see #2 for limiting reactant using ppt)	71	Demonstration
Solubility rules	Equilibrium by diffusion of coloring in water	add drops of coloring to a big beaker of water, let it sit and become uniform, notice the mixing of the color throughout class		93	Demonstration
Solubility rules	Supersaturation-sodium acetate crystallization	A supersaturated solution of sodium acetate is in a long glass tube.  A single solid crystal causes the solution to solidify.  OR pour the solution onto a surface containing a crystal and the solution forms a stalagmite.	Also see 163 for other crystals, and 146 for other exothermic reactions.  Also on Shakhashiri tape III #41; Close up on Chemistry Ealy 1:19 (1:21 min)	106	Demonstration
Solubility rules	Solubility, polar and nonpolar solvents	water, toluene, NaCl, naphthalene; Solubility of solids in liquids, temperature.  Add the two solids to 4 beakers of the solvents to see what dissolves in what.  Do not add too much solid or all won't dissolve.  Solubility of a limestone rock in 1M HCl, salt in water.		109	Demonstration
Solubility rules	Crystal formations	Saturated solutions form crystals, several variations including waterglass.	Chemical garden, microcrystals, sugar and salt, other crystal formations	163	Demonstration
Solubility rules	Supersaturation-sodium acetate crystallization	A supersaturated solution of sodium acetate is in a long glass tube.  A single solid crystal causes the solution to solidify.  OR pour the solution onto a surface containing a crystal and the solution forms a stalagmite.	Shakhashiri tape III #41; Close up on Chemistry Ealy 1:19 (1:21 min)  (For Ealy set timer to zero when first text rolls on screen.)	M36	Movie