“Hot ice“ experiment from the “Crystals“ set
Channel: MEL Chemistry
Date: 2018-04-18

Perform this amazing experiment at home with MEL Science: https://melscience.com/en/experiments/hot-ice/

Safety
* Put on protective gloves and eyewear.
* Conduct the experiment on the plastic tray.
* Observe safety precautions when working with boiling water.
* Keep a bowl of water nearby during the experiment.

Disposal
Dispose of solid waste together with household garbage.

Step-by-step instructions
1. Place three candles on the solid fuel stove and light them. Set the flame diffuser on the stove.
2. Place the beaker onto the flame diffuser and pour in 125 mL of freshly boiled water.
3. Immerse a bottle with sodium acetate CH3COONa in hot water. 4. Wait 20 min.
5. Using forceps, pull the bottle out of hot water.
6. Take a test tube from the set and stick a thermochromic sticker on it.
7. Pour sodium acetate from the bottle into the test tube.
8. Place the test tube into a plastic cup. Dip one end of a wooden stick into the solution in the test tube.
9. Wipe wet the end of the stick with a cloth.
10. Wet the test tube rubber stopper with hot water.
11. Close the test tube with the rubber stopper. Wait 15 min.
12. Touch the solution with the wooden stick.
13. Solution will start to crystallize! As it does so, it will release heat causing the thermosticker to change its color.