When sodium hydroxide is dissolved in water it feels warm, which indicates an exothermic reaction.
NaOH (s) → Na+ (aq) + OH– (aq)
– 125mL Erlenmeyer flask w/ 30mL of water
– 3g NaOH
1. Add NaOHto the flask
2. Swirl to dissolve
This demo is great for students to do themselves.
Safety goggles should be worn at all times.
This lesson plan‘s topic is the Evidences of Chemical Reactions. Students learn the various evidences, then they get a change to practice identifying them with a hands on activity. Sodium Hydroxide in Water is used in the activity portion of this lesson plan.