Chemical Reactions

Front

What is the term for the substances formed as a result of a chemical reaction?

Back

Products

Front

Which of the following is a sign of a chemical reaction: color change, cutting into fourths, or gas production?

Back

Color change and gas production are signs of a chemical reaction; cutting into fourths is not.

Front

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

Back

A chemical change results in the formation of a new substance, while a physical change does not.

Front

In the chemical equation FeS + HCl --> H2S + FeCl, how many iron (Fe) atoms are present on the reactant side?

Back

1

Front

What is a common indicator that a chemical reaction has occurred?

Back

Common indicators include color change, temperature change, gas production, and the formation of a precipitate.

Front

What is the law of conservation of mass in relation to chemical reactions?

Back

The law of conservation of mass states that mass is neither created nor destroyed in a chemical reaction; the total mass of reactants equals the total mass of products.

Front

What is a reactant in a chemical reaction?

Back

A reactant is a substance that undergoes change during a chemical reaction.

Front

What is meant by a balanced chemical equation?

Back

A balanced chemical equation has the same number of each type of atom on both sides of the equation, reflecting the conservation of mass.

Front

What is an example of a physical change?

Back

An example of a physical change is melting ice or boiling water.

Front

What is a chemical equation?

Back

A chemical equation is a symbolic representation of a chemical reaction, showing the reactants and products.