Potassium Chloride and Water Experiment: If you loved trying the sugar and sulphuric acid experiment to demonstrate the exothermic reaction, here is a new and interesting experiment with potassium chloride and water. This experiment is interesting when you can collect, record, and compare the temperature changes as the chemical reaction takes place. It is also good to learn about potassium chloride, water, and their properties.
Try it yourself
- A glass tumbler
- A teaspoon
- Water (room temperature)
- Potassium chloride
- Record sheet
Step 1: Take the glass tumbler and pour water until its half.
Step 2: Using thermometer, measure the temperature of water and record them on your record sheet.
Step 3: Add a teaspoon full of potassium chloride to the tumbler and stir the solution.
Step 4: After about 30 seconds check the temperature and record the readings.
Step 5: Repeat the steps 3 and 4 for another two times.
Potassium chloride and water experiment has a very simple logic to follow. There are two basic types of reactions – endothermic and exothermic. This is an endothermic reaction. In endothermic reactions the temperature drops. It means, when potassium chloride is mixed with water, the temperature of water drops. Do you like to learn more about endothermic reactions? If yes, visit our science lessons on endothermic reactions here.