Rate of Reactions

Which factor increases the rate of reaction by increasing the number of particles in a given volume?

• Temperature

• Surface area

• Concentration

What is the effect of increasing temperature on the rate of reaction?

• Particles move slower

• Particles collide more often and with more energy

• The amount of product decreases

Why does using a catalyst increase the rate of reaction?

• It increases the number of particles

• It increases the pressure

• It lowers the activation energy needed

Which factor is changed when a solid reactant is broken into smaller pieces?

• Pressure

• Surface area

• Concentration

In which condition would a gas reaction happen faster?

• At low pressure

• With a catalyst and high pressure

• With low temperature and large solid pieces

Which statement is true about catalysts?

• They lower the activation energy

• They change the final product

• They are used up in the reaction

Which of the following will slow down the rate of a chemical reaction?

• Decreasing temperature

• Increasing pressure

• Increasing temperature

Which factor is most important when trying to speed up a reaction involving gases?

• Stirring the mixture

• Increasing pressure

• Adding cold water

Why does increasing the surface area of a solid reactant speed up a reaction?

• It changes the temperature

• It allows more collisions between reactants

• It increases the volume of the solution

How It Increases Rate: "More contact = faster reaction"

What is the factor