Tuesday, September 8, 2009

Dissolving Hot/Cold

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See if candy dissolves faster in hot or cold water.

Red Skittles in hot water dissolve faster 
than orange Skittles in ice water
What you need:
  • Identical pieces of candy
  • Hot and cold water
  • Cups
What to do:
  1. Fill one cup with hot tap water and one with cold water (for better results, add ice cubes).
  2. Put one candy in the hot cup and one in the cold cup.
  3. Watch to see which dissolves faster.
What’s happening:
Because molecules move faster when it’s hot, the candy in hot water dissolves much faster.  The candy in ice water might take all night to dissolve.

With chocolate, the difference is even more impressive.  Since the cocoa butter in chocolate doesn't dissolve in water, chocolate placed in cold water just sits there.  But chocolate in hot water melts and mixes with the water.


  1. this expermint was such fun!! Thanks for the info. I recomnd doing this one!

  2. How Do I make a data graph on this?

  3. You could try graphing how long it took for Skittles shells to dissolve in different temperatures of water. It happens pretty fast, and it's something that you could probably put a pretty clear end point on--when the shell is gone, the white layer underneath is exposed. Otherwise you could try dissolving just about anything in various temperatures of water, just make sure that each cup contains the same amount of water and you put in the same kind of candy.

  4. My class did this experiment this week. We ended up leaving them over night to witness them dissolve all the way. My kids LOVED this experiment. I have recommended it to all of my teammates. Thank you so much

  5. Try using something with a colored shell that dissolves quickly, like Skittles, M&M's, or Nerds. Smarties and Conversation Hearts don't work as well.


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