Use Home Brand diet cola, warmed, and original Mentos that have been kept in the fridge overnight. Professor Bunsen also offer a great delivery system available for purchase but you can make your own.
Both of the following procedures MUST BE CARRIED OUT IN A FUME HOOD CHLORINE WATER Measure out 40ml of household bleach (do not use the expensive variety of bleach that has been thickened) Add 40mL of 1M sulfuric acid and then dilute with water to 100mL BROMINE WATER Take the prepared chlorine water and add […]
Products from all 3 recipes don’t last very long, so store the balls in a small zip-lock bag between uses. Recipe 1 (our favourite): 3 teaspoons water glass (sodium silicate). The cheapest place to buy is from pottery supply warehouses 1 teaspoon alcohol. Use alcohol based hand sanitiser as it smells less but isopropyl alcohol […]
Ingredients: 500g glace cherries cut in half. 1 litre bottle of water uncooked rice grains 4 or 5 flat oval yellow and white lollies or similar. Clear bowl. Method: Teacher concocts the model while giving a lesson on the components of blood. Cherries are red blood cells. Water: plasma (asks How many 1 litre bottles […]
Materials: 4 tablespoons (35 g) Bicarbonate Soda 1 tablespoon (8g) Citric Acid 2 teaspoons Sweet Almond oil 2 drops food colouring 2 drops Essential oil Pop stick Plastic cup Tea strainer Water spray Method: Sieve bicarbonate soda and citric acid together into a plastic cup Add 2 teaspoon of sweet almond oil, 2 drops of […]
Basic Recipe: 8g potassium hydroxide dissolved in 300mL water. Add 10g glucose. For blue to clear: When dissolved, add 2 to3 squirts methylene blue. For blue to pink: Also add 2 to 3 squirts phenolphthalein. For blue to yellow/green: Also add lots of fluorescein. Pour into a 1 litre volumetric flask or a jar and […]
Materials: Alka seltzer tablet, within useby date 35mm plastic film canister Methods: Do not tell the students what will happen. Get students to do a rehearsal with the film canister, but no tablet or water. All together, pretend to put the tablet in the canister, half fill with water, put upside down on the bench. […]
For solubility activity, try using denture cleanser tablets, which are more economical than Alka Seltzer.
MATERIALS : Shiny penny or 1 cent piece Granular or powdered zinc Tongs or forceps Hot plate 6M sodium hydroxide Bunsen burner Evaporating dish Beaker filled with cold water Paper towels Balance Graduated measuring cylinder METHOD: 1. Wear goggles and take CAUTION in performing this experiment. 2. Clean a penny with steel wool. Make it […]
1. Place 1-2ml methylated spirits in small plastic bottle, and place in water bath of boiling water (heat water bath on hot plate as meths is flammable). Continue heating until vapours of meths are seen. Take bottle from water bath and quickly put cap on. As it cools, the bottle is crushed. Can be done […]