04/24/2020
Will need adult help with this one. You will also need patience- this takes several days. :)
Homemade Rock Candy
Materials:
Wooden skewer or chopstick
Clothespin
1 cup water
2-3 cups sugar
Tall narrow glass or jar
1. Clip the clothespin to the skewer so that it can balance on the top of the cup and the skewer hangs down inside the cup about 1 inch from the bottom.
2. Remove the skewer and clothespin and set them aside for now.
3. Pour the water into a pan and bring it to a boil.
4. Pour about 1/4 cup of sugar into the boiling water, stirring until it dissolves.
5. Keep adding more sugar a bit at a time and stir until it dissolves. Repeat this until no more sugar will dissolve into the water. This will take time!
6. Remove from heat and let cool for at least 20 minutes.
Note: While it is cooling you can dip half of the skewer in the sugar solution and roll it in some sugar to help jump start the crystal growth. If you do this, be sure to let the skewer cool completely so that sugar crystals do not fall off when you place it back in the glass.
7. Pour the sugar solution into the jar almost to the top. Then submerge the skewer back into the glass making sure that it is hanging straight down the middle without touching the sides.
8. Allow the jar to fully cool and put it someplace where it will not be disturbed.
9. Now wait. The sugar crystals will grow over the next 3-7 days.
You can add food coloring to the solution if you want to make your rock candy a fun color.
Why does this happen? You created a super saturated solution meaning that the sugar will only stay dissolved if the water is hot. As it cools, the sugar "comes out" of the solution and back into crystals. This is a tasty science experiment!