They’re called endothermic reactions. If you take some citric acid solution and combine ... The beaker now contains sodium chloride and water. The temperature on the thermometer has risen ...

View the video below to see what you and your students will do in this lesson. Because substances are made up of different atoms and molecules, they react in characteristic ways. Production of a gas, ...

Add Calcium Chloride/Citric Acid solution to mixer and stir. Add Sodium Carbonate solution and start a timer. Mix for 1 minute, then pour into a separate container.

Endothermic reactions include solid citric acid and sodium hydrogencarbonate ... reaction of solid barium hydroxide and solid ammonium chloride. Ask students to explain their understanding ...