The rate of a non - geseous reaction does not dependent on

Options

A. Catalyst
B. Pressure
C. Concentration of `CH_3COO^(-)` will decrease
D. Temperate

Answer

To determine which factor does not affect the rate of a non-gaseous reaction, we will analyze each of the provided options.

### Step-by-Step Solution:

1. **Understanding the Factors Affecting Reaction Rate**:
- The rate of a reaction can be influenced by several factors, including concentration, temperature, pressure, and the presence of a catalyst.

2. **Analyzing Each Option**:
- **Option 1: Catalyst**: Catalysts increase the rate of reaction by lowering the activation energy. Therefore, the rate of a non-gaseous reaction does depend on the presence of a catalyst.
- **Option 2: Pressure**: For non-gaseous reactions, pressure does not significantly affect the rate. This is because pressure primarily affects gaseous reactions where the volume and concentration of gas molecules can change. Thus, the rate of a non-gaseous reaction is generally independent of pressure.
- **Option 3: Concentration of H3COO-**: The concentration of reactants does affect the rate of reaction. As the concentration of reactants increases, the rate of reaction typically increases as well.
- **Option 4: Temperature**: The rate of a reaction is highly dependent on temperature. An increase in temperature usually increases the rate of reaction due to more frequent and energetic collisions between reactant molecules.

3. **Conclusion**:
- Based on the analysis, the factor that does not affect the rate of a non-gaseous reaction is **Option 2: Pressure**.

### Final Answer:
The rate of a non-gaseous reaction does not depend on **pressure**.