To determine the nature of the solute based on the given table of temperatures and concentrations, follow these steps:
1. Examine the Relationship Between Temperature and Concentration:
- The table presents different temperatures and the corresponding concentrations of the solute in the solvent.
- The key is to see how the concentration of the solute changes as the temperature decreases.
2. Given Data:
[tex]\[
\begin{array}{|c|c|}
\hline
\text{Temp} (^{\circ}C) & \text{Concentration} \left(\text{g solute} / \text{mL solvent}\right) \\
\hline
75.2 & 0.650 \\
\hline
63.4 & 0.811 \\
\hline
51.8 & 0.967 \\
\hline
37.9 & 1.13 \\
\hline
\end{array}
\][/tex]
3. Analyze the Trend:
- As the temperature decreases from 75.2°C to 37.9°C, the concentration of the solute increases from 0.650 g/mL to 1.13 g/mL.
- This indicates that the amount of solute dissolved in the solvent is increasing as the temperature decreases.
4. Determine the Type of Solute:
- Typically, the solubility of gases in a liquid increases as the temperature decreases because gases dissolve better in colder solvents.
- Conversely, the solubility of most solids decreases as the temperature decreases, but this is not the trend we observe here.
5. Conclusion:
- Since the concentration of the solute increases as the temperature decreases, it indicates that the solute is more soluble at lower temperatures.
- This behavior is characteristic of a gas.
6. Final Answer:
- The solute is a GAS because the amount dissolved INCREASES as temperature decreases.
Thus, the correct statement is:
The solute is a GAS because the amount dissolved INCREASES as temperature decreases.
