Factors Affecting Chemical Reactions

Front

What are the factors that can affect the rate of a chemical reaction?

Back

Temperature, Concentration, Surface area, and All of the above.

Tags

NGSS.HS-PS1-5

Front

What is a physical change?

Back

A change that affects one or more physical properties of a substance without altering its chemical composition. Example: Melting of ice.

Front

What is a catalyst?

Back

A substance that increases the rate of a chemical reaction without itself undergoing any permanent chemical change.

Tags

NGSS.HS-PS1-5

Front

How does temperature affect chemical reactions?

Back

Temperature increases the rate of chemical reactions by providing energy to overcome activation energy.

Tags

NGSS.HS-PS1-5

Front

What is a chemical change?

Back

A change that results in the formation of new chemical substances. Example: Rusting of iron.

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-5

Front

Define activation energy.

Back

The minimum amount of energy required for a chemical reaction to occur.

Tags

NGSS.HS-PS1-5

Front

What is concentration in the context of chemical reactions?

Back

The amount of a substance in a given volume, which can affect the rate of reaction.

Tags

NGSS.HS-PS1-5

Front

How does surface area affect the rate of a chemical reaction?

Back

Increasing the surface area of a reactant increases the rate of reaction by allowing more collisions between reactant particles.

Front

What is the difference between a physical change and a chemical change?

Back

A physical change does not alter the chemical composition of a substance, while a chemical change results in new substances being formed.

Tags

NGSS.MS-PS1-4

Front

What is an example of a reaction that requires a catalyst?

Back

The decomposition of hydrogen peroxide, which can be sped up by adding manganese dioxide.