Question

2
multiple choice 2 points
which of the following increases the rate of reaction?
○ increasing the temperature
○ decreasing the concentration
○ removing reactants
○ lowering the temperature

Explanation:

• According to the collision theory, when the temperature increases, the kinetic energy of reactant molecules increases. This leads to more frequent and energetic collisions between molecules. As a result, the number of effective collisions (collisions that result in a reaction) increases, which speeds up the reaction rate.
• Decreasing the concentration means there are fewer reactant molecules per unit volume. So, the frequency of collisions between reactant molecules decreases, and thus the reaction rate slows down.
• Removing reactants also reduces the number of reactant molecules available to collide. Fewer reactant molecules lead to a lower frequency of collisions, and the reaction rate decreases.
• Lowering the temperature reduces the kinetic energy of reactant molecules. Molecules move more slowly, and the frequency and energy of collisions are reduced. This causes the reaction rate to decrease.

Answer:

Increasing the temperature