Final Exam Review 3 - Reaction Rates, Equilibrium, Radiation

Increase in temperature of the reactants can do one of the following

• 
  Slow collision frequency

• Cause particles to lose speed

• Allow less effective collision between the particles

• Increase collision between the particles thus increasing the rate.

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NGSS.HS-PS1-5

Na₂S + 2 HCl → 2NaCl + H₂S

What would happen if we increased the volume of the container where the reaction occurred?

• More NaCl would be produced

• 
  More reactions would occur

• Less H₂S would would be produced

• More HCl would be needed

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NGSS.HS-PS1-5

In which experiment is the rate of reaction between hydrochloric acid and calcium carbonate slowest? 

• A

• C

• B

• D

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NGSS.HS-PS1-5

Which of the following would increase the number of collisions that occur? Choose all that appy.

• Increase Surface Area

• Increase Temperature

• Decrease Concentration

• Increase Volume

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NGSS.HS-PS1-5

How could we make this reaction happen more quickly?

• Decrease the concentration of the acid

• Put the test tube in an ice bath

• crush the chalk to increase the surface area

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NGSS.HS-PS1-5

Which of the following is true?

• The reaction rate of the diagram on the left would be greater because there are more collisions that will happen because of greater surface area.

• The reaction rate of the diagram on the right would be greater because there are more collisions that will happen because of greater surface area.

• The reaction rate of the diagram on the right would be greater because there are more collisions that will happen because of lesser surface area.

• The reaction rate of the diagram on the left would be greater because there are more collisions that will happen because of lesser surface area.

In which container would you expect a higher reaction rate, and why? (Note: The number of particles is the same in both containers.)

• The left would have a higher reaction rate because it has a greater volume and more collisions will happen.

• The left would have a higher reaction rate because it has a lesser volume and more collisions will happen.

• The right would have a higher reaction rate because it has a greater volume and more collisions will happen.

• The right would have a higher reaction rate because it has a lesser volume and more collisions wil happen.

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NGSS.HS-PS1-5

Is this reaction endothermic or exothermic?

• Endothermic

• Neither

• Exothermic

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NGSS.HS-PS1-4

NGSS.HS-PS3-1

which factor that affect reaction rate is represented?

• Temperature

• 
  Surface Area

• Catalyst

• 
  Concentration

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NGSS.HS-PS1-5

Define chemical equilibrium.

• A reaction is reversible.

• The rate of a forward reaction is equal to the rate of the reverse reaction.

• The concentration of the reactants is equal to the concentration of the products.

• The reaction stops and no further change in concentration occurs.

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NGSS.HS-PS1-6