kitchen science

Diffusion and Osmosis using raw egg

Remove shell of raw quail egg by soaking it in Hydrochloric acid or vinegar for a day. Rinse it and place it in various set-up to demonstrate diffusion and osmosis.

From left to right:

Untreated, in distilled water, in red-coloured water, in honey.

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Flying rocket experiment

Students had fun today with flying rocket experiment. Conducted this activity to introduce reaction of acid with carbonate.

Add sprite in film canister, to about 3/4.
Add 3 spatulaful of baking soda on the cap.
Place the cap over the film canister and shut it tight.
Invert the film canister.
Step away and watch it launch!

Sprite can be replaced with coke or vinegar.
Baking soda can be replaced with antacid tablet.

What’s happening?
Reaction of acid and carbonate produce carbon dioxide gas. Carbon dioxide produced is trapped in the film canister provide a force for it to propel upwards.