Factors Affecting Rate of Reactions

A change in the amount of reactant or product affects the rate of reaction.

• True

• False

Tags

NGSS.HS-PS1-5

The rate of forward reaction is _______, because of the high concentration of reactants

• lowest

• highest

• moderate

• minimal

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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.

Tags

NGSS.HS-PS1-5

Usually lowering the temperature will slow down a reaction.

• false

• true

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

A catalyst increases the efficiency of collisions between reactants.

• true

• false

Tags

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

Which would not speed up a chemical reaction?

• Using a large beaker

• Increasing the concentration

• Decreasing particle size

• adding a catalyst

Which of the following factors does NOT affect the rate of a chemical reaction?

• Temperature

• Concentration of reactants

• Presence of a catalyst

• Color of reactants

Tags

NGSS.HS-PS1-5

Increasing the surface area of a solid reactant will:

• Decrease the rate of reaction

• Increase the rate of reaction

• Have no effect on the rate of reaction

• Change the reaction pathway