Factors of Rate of Reaction

The minimum amount of energy needed for colliding particles to react is called

• Chemical Energy

• Kinetic Energy

• Activation Energy

• Potential Energy

Which of the following are the factors that affecting the rate of reactions?

• Size of reactants

• Concentration of reactants

• Temperature

• Presence of catalyst

• All of above

Tags

NGSS.HS-PS1-5

Products will form faster if____________

• the particle size of the reactants are larger.

• temperature is decreased.

• concentration of the reactants are increased.

• the reaction is not stirred.

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NGSS.HS-PS1-5

Which of the following will lower the rate

of reaction?

• adding an enzyme to the reaction

• decreasing the temperature from 40°C to

  10°C

• breaking a chunk of calcium up into

  smaller pieces

• increasing the amount of solute

  dissolved in a solution

Tags

NGSS.HS-PS1-5

How does increasing the concentration affect a reaction rate?

• makes it go faster (increases rate)

• makes it go slower (decreases rate)

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NGSS.HS-PS1-5

How does increasing concentration increase the rate of a reaction?

• fewer collisions occur among reactants

• more kinetic energy is provided to the reactants

• more collisions occur among reactants

• less kinetic energy is provided to the reactants

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NGSS.HS-PS1-5

If the temperature is reduced, a reaction rate will ______

• increase

• decrease

• stay the same

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NGSS.HS-PS1-5

The glow stick glowed brighter in hot water because

• the chemical reaction slowed down in hot water

• the chemical reaction speed up in hot water

• temperature has no effect on the glow stick chemical reaction

• all of the above

Tags

NGSS.HS-PS1-5

What is the name of the model which is used to explain how different factors affect the rate of a reaction?

• Particle theory

• Big Bang theory

• Collision theory

Tags

NGSS.HS-PS1-5

Which of the following would speed up a reaction?

• Using lumps instead of powder

• Increasing the concentration of an acid

• Decreasing the temperature

Tags

NGSS.HS-PS1-5