Videos
Using the TI-89 calculator to generate a line of best fit for linear data
1. Hot Ice
This video shows how to make a supersaturated solution of sodium ethanoate (acetate). Supersaturated solutions crystallise with the slightest touch or by use of a “seed” crystal. Look closely at the person’s finger when they touch the surface of the saturated solution. What can you see?
Make Instant HOT ICE ! – video powered by Metacafe
2. The alkali metals
This video clip from Brainiac is good fun. It shows the reactivity of a selection of the Group I and II metals sodium, potassium, rubidium and cesium. Why are these metals so reactive? What do they have in common?
Alkali Metals And Water – video powered by Metacafe
3. Thermite reactions
When finely powdered aluminium is mixed with powdered ion(III) oxide (commonly known as rust) thermite has been made. Thermite reacts explosively with air to generate enormous amounts of heat energy, as can be seen in this Brainiac video clip. Reactions that release energy are called “exothermic”.
Brainiac Thermite Experiments – video powered by Metacafe
4. Elephant toothpaste
This reaction shows the extraordinary effect the use of a catalyst can have on the rate of decomposition of hydrogen peroxide. The catalyst used in manganese(IV) oxide, MnO2.
Really Foamy Reaction (Elephant Toothpaste, Old Foamy) – More free videos are here
5. Bullet footage
A cool video that has no scientific or Chemistry meaning whatsoever, but is still fun. it shows bullets passing through objects in super slow motion, complete to an extraordinary sound track.
Bullet Footage Slow Motion – The top video clips of the week are here
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