Fun experiments for kids related to dissolving.
Discussion
I recall a demonstration where 100ml of one liquid (water perhaps) and 100ml of another (alcohol of some sort) are mixed and the resulting cocktail is less than 200ml in volume. It's meant to demonstrate that the molecules of one liquid will fit between those of another.
Mrs Eleven (a supply school teacher) needs to do some fun experiments with her class next week and I suggested this one. However can anyone remind me what liquids are best to bring about the most dramatic effect please? They need to be easily obtainable obviously.
Any other fun experiments related to "dissolving" (easily performed) also appreciated!
Many thanks.
You can do this with sugar or salt too.
Compare speed of dissolving caster sugar and demerara - surface area.
Saturate a hot water solution and allow it to cool. Watch crystals re-appear. Drop of any solution on a glass slide also shows the growth of crystals.
Dye sand and spray it with scotchguard. Put it in a beaker of water. When you take it out it will be dry... (has been on QI)
Compare speed of dissolving caster sugar and demerara - surface area.
Saturate a hot water solution and allow it to cool. Watch crystals re-appear. Drop of any solution on a glass slide also shows the growth of crystals.
Dye sand and spray it with scotchguard. Put it in a beaker of water. When you take it out it will be dry... (has been on QI)
Edited by CubanPete on Thursday 6th February 21:45
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