Grow Some Rock Candy

Grow Some Rock Candy
Ages 4 and up with adult help

 

The kitchen is a great place to practice your science skills, including this tasty experiment to learn about chemistry! In order to make rock candy, we need to grow sugar crystals from a supersaturated solution. A supersaturated solution means there is more sugar than the water could normally hold, which means the sugar molecules have a higher chance of finding each other, and combining in an orderly pattern that makes a crystal. By boiling the water, and then letting it evaporate, we make it easy for those molecules to find each other and really get growing. 

Materials

  • Cake pop 
  • Stick
  • 1 cup water 
  • 2-3 cups sugar
  • 1 Tbsp. food coloring
  • 1 medium-sized pot
  • 2 Mason jars
  •  Clothespin

Directions

  1. Dip the stick in water and then coat the lower 3/4ths in a thin layer of sugar.
  2.  Set the stick aside to dry until the sugar is hardened.
  3. In the meantime, add 1 cup of water to a medium-sized pot and bring to a simmer on low heat.
  4.  Add in about 2-3 cups sugar a little at time, stirring as you go. Wait to add more sugar until what you have put in is completely dissolved.
  5. Continue until the sugar is no longer dissolving in the water.
  6.  Add in 1 Tbsp. of desired food coloring and stir until the mixture is a uniform color.
  7. Pour the mixture into a mason jar and let cool for about 30 minutes.
  8. Attach a clothespin to the end of your stick without sugar on it and lower it into the mason jar (make sure the stick isn’t touching the bottom of the jar).
  9. Store in a safe place and let sit for 3-5 days.
  10. Transfer the stick to another mason jar and let dry.
  11.  Remove the clothespin once the candy is dried and enjoy!

More fun

  • Learn more about Crystals here 
  • Spill some salt and sugar on a surface, keeping them mostly separate. Use a magnifying glass to observe the different grains of salt and sugar. Does the shape of the individual grains look different?

 

Posted in Uncategorized and tagged , , , .