Signs of Chemical Reactions

Front

What is the purpose of plating or covering iron with less reactive substances?

Back

To prevent rusting.

Front

What happens to reacting particles when pressure is increased?

Back

They move closer together.

Front

What effect does an increase in temperature have on particle movement?

Back

Particles move faster.

Front

Is dissolving salt a chemical change or a physical change?

Back

Physical change.

Front

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

Back

It increases both the frequency of collisions and the energy of reactant particles.

Front

What is a chemical reaction?

Back

A process that involves the rearrangement of the molecular or ionic structure of a substance.

Front

What are the signs of a chemical reaction?

Back

Color change, temperature change, gas production, and precipitate formation.

Front

What is activation energy?

Back

The minimum energy required for a chemical reaction to occur.

Front

How does concentration affect the rate of a reaction?

Back

Higher concentration increases the rate of reaction due to more frequent collisions.

Front

What is a catalyst?

Back

A substance that increases the rate of a chemical reaction without being consumed.