Chemical Reaction Review 2024

Front

What is a chemical reaction?

Back

A process where substances (reactants) undergo a transformation to form new substances (products) with different properties.

Front

What is a balanced chemical equation?

Back

An equation where the number of atoms for each element is the same on both sides, indicating that mass is conserved.

Front

What is a physical change?

Back

A change that affects one or more physical properties of a substance but does not alter its chemical composition.

Front

What is a chemical change?

Back

A change that results in the formation of new chemical substances with different properties.

Front

What is an example of a chemical change?

Back

Burning wood, which produces ashes, smoke, and gases.

Front

What is an example of a physical change?

Back

Melting ice into water, where the substance remains H2O.

Front

What happens to atoms during a chemical reaction?

Back

Atoms are rearranged to form new substances, but they are not created or destroyed.

Front

What is the law of conservation of mass?

Back

In a chemical reaction, mass is neither created nor destroyed; it is conserved.

Front

What is etching in the context of chemical changes?

Back

A process that uses chemicals to remove material, changing the chemical structure of the substance.

Front

What is an indicator of a chemical change?

Back

Signs include color change, temperature change, gas production, or the formation of a precipitate.