Rates of Reactions

Select four factors that affects the rate of a reaction

• temperature

• concentration

• surface area

• volume

• catalysts

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NGSS.HS-PS1-5

A temperature increase causes the particles ......

• to slow down

• move faster

• collide higher

• in the right order

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NGSS.HS-PS1-5

NGSS.HS-PS3-2

How does a catalyst work in speeding up a reaction?

• By lowering the activation energy or reaction

• by giving them more energy

• by making them more available

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NGSS.HS-PS1-5

Why does a higher concentration increase the rate of reaction?

• it increases the amount of reactants

• it lowers the activation energy

• it increases the energy of particle collisions

• it increases the frequency of particle collisions

Tags

NGSS.HS-PS1-5

What makes an effective collision under collision theory?

• When molecules collide.
• When molecules collide with the proper orientation.
• When molecules collide with proper orientation and enough kinetic energy.
• High Temperature.

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.HS-PS1-5

You add more bodies into a "mosh pit" to hope for more collisions.  You have increased-

• temperature
• concentration
• pressure
• catalyst

Tags

NGSS.HS-PS1-5

Which would NOT increase the rate at which a sugar cube dissolves?

• Reducing the amount of solvent

• Crushing the sugar cube

• Stirring the solution

• Heating the solvent

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 will happen.

Tags

NGSS.HS-PS1-5

Which factor that affects reaction rate is represented in the image?

• Temperature

• Catalyst

• Surface Area

• Concentration

Tags

NGSS.HS-PS1-5