Question 58
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.
Test your prediction by repeating steps 1 to 5 with different amounts of the salts. Measure and record the temperatures.
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.
Test your prediction by repeating steps 1 to 5 with different amounts of the salts. Measure and record the temperatures.
