Reaction Rates and Catalyst

Which of the following will increase the frequency of successful collisions?

• Increasing the temperature

• Decreasing the pressure

• Decreasing the concentration

Tags

NGSS.HS-PS1-5

What substance speeds up the reaction rate by lowering the activation energy needed to start the reaction?

• Concentration

• Catalysts

• Pressure

• Temperature

How quickly a reaction will take place is called what?

• Reaction Rate

• Temperature

• Catalyst

• Pressure

Tags

NGSS.HS-PS1-5

What factor affects the rate of a chemical reaction by increasing the kinetic energy of particles?

• Catalysts

• Concentration

• Surface Area

• Temperature

Tags

NGSS.HS-PS1-5

What factor affects the rate of a chemical reaction by increasing the concentration, therefore speeding up the reaction?

• Catalysts

• Concentration

• Surface Area

• Temperature

Tags

NGSS.HS-PS1-5

Match the following Reaction Rate affect with the definition of why it speeds up reactions.

• Catalyst

• Higher amounts of this of this leads to more frequent collisions between reactant particles

• Pressure

• The more of this causes there to be more room for the particles to collide and react with one another

• Surface Area

• The higher the ____ = the smaller of the volume, causing more particle collisions

• Concentration

• The higher the ______, the faster the reaction because more particles are moving and colliding, thus contacting with each other to react.

• Temperature

• This substance speeds the reaction rate by lowering the activation energy needed to start the reactions

Tags

NGSS.HS-PS1-5

NGSS.HS-PS3-4

Enzymes in your body act as catalysts. Thus, the role of enzymes is to___________.

• inhibit chemical reactions.

• increase the rate of chemical reactions.

• decrease the rate of chemical reactions.

Tags

NGSS.HS-LS1-7

NGSS.HS-PS1-5

________ the concentration ______ the reaction rate.

• increasing; decreases

• increasing; increases

• decreasing; increases

• decreasing; does not effect

Tags

NGSS.HS-PS1-5

The minimum amount of energy needed for substances to react is called__________.

• Activation Energy

• Catalyst Energy

• Endothermic Energy

• Exothermic Energy

Which of the following factors does NOT affect the rate of a chemical reaction?

• A) Temperature

• B) Catalyst

• C) Color of reactants

• D) Concentration

Tags

NGSS.HS-PS1-5