6.6E Chemical Changes CFA

Front

What is a chemical change?

Back

A chemical change is a process that results in the formation of new substances with different properties from the original substances.

Front

How does a chemical change differ from a physical change?

Back

A chemical change produces a new substance while a physical change does not.

Front

What is an example of a chemical change?

Back

Burning wood, where the wood transforms into ash and smoke.

Front

What is an example of a physical change?

Back

Melting ice, where ice turns into water but remains H2O.

Front

What are indicators of a chemical change?

Back

Indicators include color change, gas production, temperature change, and formation of a precipitate.

Front

What does it mean when a gas is produced during a reaction?

Back

It indicates that a chemical change has occurred, as new substances are formed.

Front

What is a precipitate?

Back

A precipitate is a solid that forms and settles out of a liquid mixture during a chemical reaction.

Front

What does it mean for a substance to dissolve?

Back

Dissolving is a physical change where a solid mixes with a liquid to form a solution, but it does not create a new substance.

Front

What is the significance of temperature change in a chemical reaction?

Back

A temperature change can indicate that a chemical reaction has occurred, often releasing or absorbing energy.

Front

What is the role of reactants in a chemical reaction?

Back

Reactants are the starting substances that undergo a chemical change to form products.