GCSE Chemistry - Factors Affecting the Rate of Reaction #47

The video explains factors affecting chemical reaction rates, including temperature, concentration, pressure, surface area, and catalysts. It introduces collision theory, emphasizing the importance of activation energy and collision frequency. Temperature increases particle energy and collision frequency, enhancing reaction rates. Higher concentration and pressure lead to more frequent collisions. Greater surface area allows more collisions, speeding up reactions. Catalysts lower activation energy, providing alternative pathways for reactions, increasing successful collisions.

What is the minimum energy required for particles to react called?

• Kinetic energy

• Potential energy

• Collision energy

• Activation energy

How does increasing the temperature affect the rate of a chemical reaction?

• It has no effect on the reaction rate.

• It decreases the energy of particles.

• It reduces the frequency of collisions.

• It increases the energy and frequency of collisions.

What happens to the rate of reaction when the concentration of a solution is increased?

• The rate increases due to more frequent collisions.

• The rate decreases due to lower energy.

• The rate decreases due to fewer collisions.

• The rate remains unchanged.

Which form of magnesium would react fastest with an acid, given the same mass and volume?

• Small chunks

• Powder

• Liquid

• Solid block

What is the role of a catalyst in a chemical reaction?

• It increases the activation energy.

• It provides an alternative pathway with lower activation energy.

• It is consumed in the reaction.

• It decreases the frequency of collisions.