Rates of Reaction Review Yr 9

Which factors affect the rate of a reaction?

• temperature

• concentration

• surface area

• the size of a reaction container

• catalyst

Tags

NGSS.HS-PS1-5

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

• to slow down

• move faster

• collide higher

• in the right order

Tags

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

Why does breaking up a lump of potassium into smaller pieces increase the rate of reaction?

• more product particles are there.

• less reactant particles are exposed to react.

• less product particles are exposed.

• more reactant particles are exposed to react.

Tags

NGSS.HS-PS1-5

The rate of a reaction is how _____________ a reaction occurs.

• Quickly

• Easily

• Unusually

• Differently

Tags

NGSS.HS-PS1-5

As the ______________ of collision increases, the rate of reaction increases.

Hint: frequency means how often

• Time

• Speed

• Frequency

• Minutes

Why does a higher temperature increase the rate of a reaction?

• it increases both the frequency and energy of particle collisions

• it only increases the frequency of particle collisions

• it reduces the energy of particle collisions

• it reduces the activation energy of the reaction

Tags

NGSS.HS-PS1-5

Why does breaking up a solid reactant increase the rate of reaction?

• it creates more solid
• it creates more energy
• it increases the surface area
• it increases the concentration

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

How does a catalyst affect the rate of a chemical reaction?

• It decreases the activation energy

• It increases the activation energy

• It increases the concentration of reactants

• It decreases the frequency of collisions