When ammonium nitrate is dissolved in water it feels cold, which indicates an endothermic reaction.
NH4NO3 (s) → NH4+ (aq) + NO3– (aq)
– 125mL Erlenmeyer flask w/ 30mL of water
– 3g NH4NO3
1. Add NH4NO3 to the flask
2. Swirl to dissolve
This demo is great for students to do themselves.
Safety goggles should be worn at all times.
Shakhashiri, B.Z. Chemical Demonstrations; University of Wisconsin Press: Madison, 1983; Vol. 1, pp 8 -9.
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. Ammonium Nitrate in Water is used in the activity portion of this lesson.