Concentration and Rate of Reaction Quiz

What are the two main factors that can increase the rate of a chemical reaction according to collision theory?

• Decreased volume and increased surface area

• Increased temperature and pressure

• More frequent particle collisions and higher energy particles

• Larger reaction vessel and more reactants

How does increasing the concentration of reactants affect the rate of reaction?

• It decreases the rate of reaction

• It has no effect on the rate of reaction

• It increases the rate of reaction

• It changes the color of the reactants

What happens to the number of particles in a given volume when concentration is increased?

• The number of particles decreases

• The number of particles remains the same

• The number of particles increases

• The particles disappear

According to collision theory, why does a higher concentration lead to a higher rate of reaction?

• Because particles become larger

• Because particles move faster

• Because particles gain more energy

• Because particles collide more frequently

Does increasing concentration affect the energy of the particles involved in a reaction?

• Yes, it increases their energy

• Yes, it decreases their energy

• No, it makes them lose energy

• No, it does not change their energy