Reaction rate

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 right 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 lesser volume and more collisions wil happen.

Tags

NGSS.MS-PS1-2

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 lesser 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 left would be greater because there are more collisions that will happen because of lesser surface area.

Tags

NGSS.MS-PS1-2

More collisions (in the correct orientation) results in... (choose all that apply)

• a slower reaction rate

• an increased reaction rate

• more product being produced

• less volume of the reaction container

Tags

NGSS.HS-PS1-5

How could we make this reaction happen more quickly?

• Decrease the concentration of the acid

• crush the chalk to increase the surface area

• Put the test tube in an ice bath

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-4

Which of these will NOT speed up the rate of reaction between a strip of magnesium and hydrochloric acid?

• tightly coil up the strip of magnesium
• cut up the strip of magnesium
• increase the concentration of the hydrocholoric acid
• increase the temperature of the hydrocholoric acid

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-4

At what time the volume of product reach 35 cm3

• 0

• 100

• 20

• 60

What label should the x-axis be in a rate of reaction graph?

• Temperature of reactants

• Volume of reactants

• Time taken

Q. At what time the rate of reaction the highest?

• T1

• T2

• T3

• T4

Tags

NGSS.MS-PS1-2

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.

Tags

NGSS.MS-PS1-4

Smaller particle size allows for a _________ surface area to be exposed for the reaction.

• larger

• smaller

• rectangular

• spherical

Tags

NGSS.MS-PS1-2