discussion techniques quiz

📚 Quick Study Guide

• ⚛️ Collision Theory: Chemical reactions occur when reactants collide with sufficient energy (activation energy) and proper orientation.
• 🌡️ Temperature: Increasing temperature usually increases reaction rate because more molecules have the required activation energy.
• 📈 Concentration: Higher reactant concentrations lead to more frequent collisions, increasing reaction rate.
• 🧪 Catalysts: Catalysts provide an alternative reaction pathway with a lower activation energy, speeding up the reaction without being consumed.
• 📏 Surface Area: For reactions involving solids, increasing surface area increases the area available for collisions.
• $\bf E_a$: Activation energy, the minimum energy required for a reaction to occur.
• $\bf Rate = k[A]^m[B]^n$: Rate law, where k is the rate constant, [A] and [B] are reactant concentrations, and m and n are reaction orders.

🧪 Practice Quiz

1. Which of the following factors does NOT affect the rate of a chemical reaction?
   1. Concentration of reactants
   2. Presence of a catalyst
   3. Color of the reactants
   4. Temperature of the reaction
2. What is the minimum energy required for a chemical reaction to occur called?
   1. Kinetic energy
   2. Potential energy
   3. Activation energy
   4. Thermal energy
3. According to collision theory, what two conditions must be met for a collision to result in a chemical reaction?
   1. Sufficient energy and correct pressure
   2. Sufficient energy and correct orientation
   3. Correct orientation and low energy
   4. High pressure and low energy
4. How does a catalyst increase the rate of a chemical reaction?
   1. By increasing the activation energy
   2. By decreasing the activation energy
   3. By increasing the temperature
   4. By decreasing the concentration
5. In the rate law, Rate = k[A]^m[B]^n, what do 'm' and 'n' represent?
   1. The rate constant
   2. The reactant concentrations
   3. The reaction orders
   4. The activation energies
6. For a reaction involving a solid reactant, how does increasing the surface area affect the reaction rate?
   1. Decreases the reaction rate
   2. Has no effect on the reaction rate
   3. Increases the reaction rate
   4. Changes the reaction mechanism
7. If increasing the temperature increases the rate of a reaction, what happens to the value of the rate constant, k?
   1. It decreases
   2. It increases
   3. It stays the same
   4. It becomes zero