Which of the following is dependent on temperature?

Options

A. Molaity
B. Molarity
C. Mole fraction
D. Weight percentage

Explanation

To determine which of the following properties is dependent on temperature, we need to analyze each option provided: molality, molarity, mole fraction, and weight percentage.

### Step-by-Step Solution:

1. **Understanding the Properties**:
- **Molarity (M)**: Defined as the number of moles of solute per liter of solution.
- **Molality (m)**: Defined as the number of moles of solute per kilogram of solvent.
- **Mole Fraction (χ)**: Defined as the number of moles of a component divided by the total number of moles of all components in the solution.
- **Weight Percentage (w%)**: Defined as the mass of solute divided by the mass of solution, multiplied by 100.

2. **Analyzing Each Property**:
- **Molality**:
- Formula: \( m = \frac{\text{moles of solute}}{\text{mass of solvent (kg)}} \)
- Both moles and mass are independent of temperature. Therefore, molality does not depend on temperature.

- **Molarity**:
- Formula: \( M = \frac{\text{moles of solute}}{\text{volume of solution (L)}} \)
- Moles are independent of temperature, but volume changes with temperature. As temperature increases, volume typically increases, which affects molarity. Therefore, molarity is dependent on temperature.

- **Mole Fraction**:
- Formula: \( \chi_A = \frac{\text{moles of component A}}{\text{total moles}} \)
- Since mole fraction is based on the number of moles, which is independent of temperature, mole fraction does not depend on temperature.

- **Weight Percentage**:
- Formula: \( w\% = \frac{\text{mass of solute}}{\text{mass of solution}} \times 100 \)
- Both mass of solute and mass of solution are independent of temperature. Therefore, weight percentage does not depend on temperature.

3. **Conclusion**:
- Among the options provided, only **molarity** is dependent on temperature. Thus, the correct answer is **molarity**.

### Final Answer:
**Molarity is the property that is dependent on temperature.**