There is a more interesting activity to explain how fireworks are made, without actually exposing the students to greater risk. ( I have to say greater because there is still a risk doing this practical.) How do fireworks create that spectacular fountain of colours and amazed young and old alike. The gorgeous exploding mixture of purples and reds, blues, yellows, greens, lilac, is just a salt away. Chemistry has loads to offer when it comes to interesting activities, and this is one of those.
Showing posts with label sodium salts. Show all posts
Showing posts with label sodium salts. Show all posts
Sunday, 20 February 2011
Saturday, 15 January 2011
OH MY SALT!
How can you get salt from a rock salt or seawater? This is a simple classroom demo to show that the common salt in the kitchen is mined from underground or can be taken out from the seawater.
You may use either rock salt or seawater (which ever is readily available in your school).
“ALWAYS BE CAREFUL WHEN DOING AN EXPERIMENT”
Materials/Apparatus
- Rock salt ( or seawater)
- Mortar and pestle
- 2 x 250 ml beaker
- evaporating basin
- tripod
- bunsen burner
- gauze
- heatproof mat
- goggles ( or any eye protection)
- stirring rod
- filter paper
- funnel
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