Endothermic Reaction Demonstration

Unit 5: Chemical Reactions
Lesson 9 of 11

Objective: Students will be able to observe an endothermic reaction which mixes barium hydroxide and ammonium thiocyanate to freeze a flask to a wooden plank.

Big Idea: Endothermic reactions are cold and more difficult to demonstrate. This is safe, cheap, easy, and exciting.

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  145 minutes
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