How does solubility for a solid vary with temperature?
Some sample data similar to the lab is given below.
Oxygen in Water
| Temperature (°C) | Concentration (mg solute/mL solvent) |
|---|---|
| 5 | 0.12 |
| 15 | 0.10 |
| 25 | 0.08 |
| 45 | 0.06 |
Sucrose in Water
| Temperature (°C) | Concentration (g solute/ml solvent) |
|---|---|
| 10 | 1.95 |
| 30 | 2.20 |
| 50 | 2.60 |
| 70 | 3.20 |
Answer (1)
The solubility of oxygen (a gas) decreases as temperature increases.
The solubility of sucrose (a solid) increases as temperature increases.
These trends are observed from the provided data on concentration changes with temperature.
Therefore, the solubility of gases and solids vary differently with temperature. Oxygen: decreases, Sucrose: increases
Explanation
Understanding the Problem We are asked to describe how the solubility of a gas (oxygen) and a solid (sucrose) change with temperature based on the provided data.
Analyzing Oxygen Data Let's analyze the data for oxygen in water. As the temperature increases from 5°C to 45°C, the concentration of oxygen decreases from 0.12 mg/mL to 0.06 mg/mL. This indicates that the solubility of oxygen decreases as the temperature increases.
Analyzing Sucrose Data Now, let's analyze the data for sucrose in water. As the temperature increases from 10°C to 70°C, the concentration of sucrose increases from 1.95 g/mL to 3.20 g/mL. This indicates that the solubility of sucrose increases as the temperature increases.
Conclusion Based on the data, we can conclude that the solubility of oxygen (a gas) decreases as temperature increases, while the solubility of sucrose (a solid) increases as temperature increases.
Examples
Imagine you're brewing a cup of tea. Hot water dissolves more sugar (sucrose), making it sweeter. This is because the solubility of solids like sugar increases with temperature. On the other hand, if you leave a soda out in the sun, it loses its fizz faster. This happens because the solubility of gases like carbon dioxide decreases with temperature, causing the gas to escape. Understanding how temperature affects solubility helps in many everyday situations, from cooking to understanding environmental processes.
