Experiment Worksheet: Testing Solubility at Different Temperatures

Objective: To investigate the effect of temperature on the solubility of a solute in a solvent.

Materials: - 5g of solute (e.g. sugar, salt, baking soda) - 50mL of solvent (e.g. water) - 5 beakers or cups - Stirring rod - Thermometer - Hot plate or stove - Stopwatch or timer - Graph paper - Pencil

Procedure: 1. Label the 5 beakers or cups as follows: Room Temperature, 30°C, 40°C, 50°C, and 60°C. 2. Measure 10mL of solvent into each beaker or cup. 3. Add 1g of solute to each beaker or cup. 4. Stir the mixture in each beaker or cup until the solute dissolves completely. 5. Place the beaker or cup labeled Room Temperature on a table or bench. 6. Place the beakers or cups labeled 30°C, 40°C, 50°C, and 60°C on a hot plate or stove. 7. Heat the beaker or cup labeled 30°C on the hot plate or stove until the temperature reaches 30°C. Use the thermometer to measure the temperature. 8. Repeat step 7 for the beakers or cups labeled 40°C, 50°C, and 60°C. 9. Record the temperature of each beaker or cup in a table. 10. Start the stopwatch or timer and wait for 5 minutes. 11. After 5 minutes, observe each beaker or cup and record whether the solute has dissolved or not. 12. If the solute has not dissolved, stir the mixture gently and observe again after 1 minute. 13. Repeat step 12 until the solute has dissolved or until 10 minutes have passed. 14. Record the time taken for the solute to dissolve in each beaker or cup in a table. 15. Plot a graph of temperature (x-axis) versus time taken for solute to dissolve (y-axis) using the graph paper and pencil. 16. Interpret the graph and draw conclusions about the effect of temperature on solubility.

Data Table:

Temperature (°C)	Time taken for solute to dissolve (minutes)
Room Temperature
30°C
40°C
50°C
60°C

Graph:

[Insert graph here]

Conclusion:

[Write a conclusion based on the graph and observations made during the experiment. For example, “The graph shows that as temperature increases, the time taken for the solute to dissolve decreases. This indicates that solubility increases with temperature. Therefore, higher temperatures generally result in more solute being dissolved in a given amount of solvent.”]