Factors Affecting Reaction Rate

What are the two necessary conditions in order for a chemical reaction to occur? (You may select more than 1 answer)

• Reactants must have a higher potential energy than products

• Particles must collide in the correct orientation.

• Particles must collide in the presence of a catalyst.

• Particles must have sufficient energy to overcome the activation energy.

What do you call the minimum amount of energy required for a chemical reaction to occur?

• Potential energy

• Kinetic energy

• Activation energy

• Chemical energy

Which of the following would slow down a reaction?

• Putting it in an ice bath

• Putting it in a hot bath

• Increasing the pressure

• Increasing the concentration

5.0 g of catalyst was added to speed up the reaction. How much catalyst was left at the end of the reaction?

• more than 5.0 g

• exactly 5.0 g

• less than 5.0 g

• cannot be determined

True or False: Between two solids of the same mass, the solid that is larger in size will influence an increase in the rate of a reaction.

• True

• False

How could we increase the rate of this reaction?

• Decrease the concentration of the acid

• Crush the chalk to increase surface area

• Put the test tube in an ice bath

• Add another piece of chalk

Why does coating with paint slow down the rusting of iron?

• The paint is an "anti-catalyst", causing opposite reaction to occur

• The paint cools down iron to slow down the reaction.

• The paint stops O2 from reacting with iron, decreasing the concentration of O2

• The paint decreases the surface area of iron, slowing down the rusting

What concentration of HCl acid would react the fastest with magnesium?

• 1.0

• 0.1

• 0.01

• 0.2