Factors Affecting Chemical Reactions

What is needed for particles to successfully react?

• They must be colorful.

• They need to collide with enough energy.

• They should be very large.

• They must be in water.

How does increasing temperature affect a reaction?

• It turns particles into gas.

• It makes particles slower.

• It decreases the number of particles.

• It increases the number of successful collisions.

What happens when the pressure of a gas reaction is increased?

• Particles become lighter.

• Particles disappear.

• Particles change color.

• Particles become more crowded.

What is the effect of increasing the concentration of a solution?

• It increases the number of collisions.

• It changes the color of the solution.

• It reduces the number of particles.

• It makes the solution colder.

How do catalysts speed up reactions?

• By increasing the temperature.

• By changing the color of the reactants.

• By providing a lower energy path.

• By adding more particles.