Question 57
Work in small groups.
1. Fill two beakers with 100 cm³ of water each. Measure and record the temperature of the water in each beaker.
2. Measure out 10 g of sodium hydrogen carbonate. Add it to the first beaker of water.
3. Stir the solution. Measure and record its temperature.
4. Measure out 10 g of potassium chloride. Add it to the second beaker of water.
5. Stir the solution. Measure and record its temperature.
Predict what you think would happen to the temperature change observed if you added more or less of each salt.
1. Fill two beakers with 100 cm³ of water each. Measure and record the temperature of the water in each beaker.
2. Measure out 10 g of sodium hydrogen carbonate. Add it to the first beaker of water.
3. Stir the solution. Measure and record its temperature.
4. Measure out 10 g of potassium chloride. Add it to the second beaker of water.
5. Stir the solution. Measure and record its temperature.
Predict what you think would happen to the temperature change observed if you added more or less of each salt.
