Chemical Reactions Review

Front

What is a balanced chemical equation?

Back

A chemical equation is balanced when the number of atoms of each element is the same on both sides of the equation.

Front

What does the symbol (g) represent in a chemical equation?

Back

The symbol (g) represents gas.

Front

What are three pieces of evidence that a chemical reaction is occurring?

Back

Change in color, formation of a gas, and temperature change.

Front

How do you balance the equation: Fe + O₂ → Fe₂O₃?

Back

4 Fe + 3 O₂ → 2 Fe₂O₃.

Front

What do coefficients represent in a chemical equation?

Back

Coefficients represent the number of units of each substance taking part in the chemical reaction.

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 a product in a chemical reaction?

Back

A product is a substance that is formed as a result of a chemical reaction.

Front

What does the symbol (l) indicate in a chemical equation?

Back

The symbol (l) indicates that the substance is in a liquid state.

Front

What does the symbol (aq) represent in a chemical equation?

Back

The symbol (aq) represents an aqueous solution, meaning the substance is dissolved in water.

Front

What is the law of conservation of mass?

Back

The law of conservation of mass states that mass is neither created nor destroyed in a chemical reaction.