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Endothermic Chemical Reaction Activity with Epsom Salt and Water

In this simple chemistry activity, your student will be able to feel the results of the endothermic chemical reaction, as well as to measure what happened. This is what makes it a fun demonstration and effective teaching activity.

Materials

  • 1 liquid measuring cup
  • 1 dry ingredient measuring cup
  • 1 1/4 cups Room temperature water
  • 1 bowl
  • 1 paper cup
  • Epsom salt
  • Spoon
  • Thermometer

Instructions

  • Set 1 ¼ cups of water out so it comes to room temperature
  • Pour ¼ cup of water into the paper cup and 1 cup of water into the bowl.
  • Measure and record the temperature of the water in the cup and in the bowl.
  • Add ½ cup of Epsom salt to the paper cup only and STIR, STIR, STIR.
  • Let sit for 30-45 seconds.
  • Take the temperature of the water in the bowl, then the temperature of the water in the cup.
  • Continue to stir a little and take the temperature of the water in the cup. What’s the temperature after 1 minute, 5 minutes, 15 minutes?

Video