Free Printable Rate of Reactions

Worksheets

Rate of Reactions

Total questions: 22

Worksheet time: 35mins

Name

Class

Date

List four factors that affects the rate of a reaction

temperature

concentration

surface area

volume

catalysts

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

to slow down

move faster

collide higher

in the right order

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

The rate of a chemical reaction is NOT affected by which of the following:

temperature

concentration

particle size (surface area)

All of these affect reaction rates

The rate of a reaction increases as temperature__________________.

Decreases

Increases

Stays the Same

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.

A ______________ is a substance that increases the rate of a reaction without being used up during the reaction.

catalyst

product

reactant

solute

The ___________ the surface area of the reactants, the faster the reaction rate.

larger

smaller

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

larger

smaller

10.

Increasing the temperature will increase the kinetic energy of particles, therefore increasing the collisions between particles.

false

true

11.

Usually lowering the temperature will slow down a reaction.

false

true

12.

Increasing the concentration of the reactants will slow down the reaction.

false

true

13.

A catalyst increases the efficiency of collisions between reactants.

true

false

14.

You observe bubbles after adding metal to a solution. Do you assume a chemical reaction took place?

Yes

15.

A solution is heated and bubbles form. Do you assume a chemical reaction took place?

Yes

16.

Two clear and colorless solutions are combined within a test tube. The result is very cloudy. Do you assume a chemical reaction took place?

Yes

17.

Two clear and colorless solutions are combined within a test tube. The resulting solution is purple. Do you assume a chemical reaction took place?

Yes

18.

Metal is added to a solution in a test tube. The test tube now feels cooler. Do you assume a chemical reaction took place?

Yes

19.

A beaker containing a solution is heated. The beaker now feels warm. Do you assume a chemical reaction took place?

Yes

20.

Which factors affect the rate of a reaction?

temperature

concentration

surface area

pressure

catalyst

21.

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

to slow down

move faster

collide higher

in the right order

22.

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

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Rate of Reactions

Total questions: 22

Worksheet time: 35mins

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