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Freezing Lemonade in front of your eyes

Public summary: 

Open a bottle of lemonade and watch it freeze solid!

Freezing lemonade by lowering air pressure.
Useful information
Kit List: 

Salt ice bath (use a box if in need of a container)
Lemonade bottles

Packing Away: 

This experiment has no fixed home, however it's 99% consumables and a container.


Cool down lemonade to about -5°C in an ice salt bath and then open the lid. As you do so it will freeze. This is because you reduce the number of solutes in it by letting the CO2 come off increasing the melting point, it also creates lots of bubbles which can act as nucleation points for the ice.

Risk Assessment
Date risk assesment last checked: 
Fri, 31/01/2020
Risk assesment checked by: 
Beatrix Huissoon
Date risk assesment double checked: 
Sun, 02/02/2020
Risk assesment double-checked by: 
Risk Assessment: 
Hazard Risk Affected person(s) Likelihood Severity Overall Mitigation Likelihood Severity Overall
Spills Slip hazard if you drop the ice water mix on the floor All 4 2 8 Clean up spill immediately. Call a first aider in the event if injury. 2 2 4
Cold The lemonade bottles may be cold as they're frozen. All 4 1 4 People should drop them as an instinctive body response. Warn people not to touch frozen bottles. Call a first aider in case of accident. 3 1 3
Explosions Bottle exploding if it froze hard, and had lots dissolved gases in it and it was damaged All 2 4 8 Don't let sealed bottles freeze hard. Check bottle has no obvious damage before beginning the demonstration. 1 4 4