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Sodium Acetate
Supersaturated Solution
Purpose - A suersaturated solution of sodium acetate trihydrate will recrystalize by adding a single crystal of the solid.
Supersaturated solution
- a solution which contains a greater amount of disolved substance than a saturated solution
- the result of the solution being cooled from a higher temperature to a temperature below that at which saturation occurs
- crystalization does not occur when cooled
Uses for supersaturated sodium acetate include hot packs, hand warmers and foot warmers
Materials needed:
- Sodium acetate trihydrate, 160g
- Distilled water, 30mL
- Erlenmeyer flask, 500mL
- Parafilm
- Graduated Cylinder
- Balance
- Hot plate / magnetic stirrer
- Chemical resistant goggles and gloves and apron
Procedure:
- weigh out 160g of sodium acetate
- add 30mL of Distilled water to the solid
- heat and stir solution until completely dissolved(approx. 15min.)
- cover flask with parafilm and allow it to cool to room temperature
- take off the paraflm and add a single crystal
- the solution should recrystalize