Balancing Chemical Reactions

Front

What is a balanced chemical equation?

Back

A balanced chemical equation has the same number of each type of atom on both sides of the equation, indicating that mass is conserved during the reaction.

Front

What does the law of conservation of mass state?

Back

The law of conservation of mass states that mass cannot be created or destroyed in a chemical reaction; it can only change forms.

Front

What are coefficients in a chemical equation?

Back

Coefficients are the numbers placed in front of the compounds in a chemical equation to indicate the number of molecules or moles of each substance involved in the reaction.

Front

How do you determine if a chemical equation is balanced?

Back

To determine if a chemical equation is balanced, count the number of atoms of each element on both sides of the equation. If they are equal, the equation is balanced.

Front

What is the first step in balancing a chemical equation?

Back

The first step in balancing a chemical equation is to write the unbalanced equation and then count the number of atoms of each element on both sides.

Front

What is the significance of the subscripts in a chemical formula?

Back

Subscripts in a chemical formula indicate the number of atoms of each element in a molecule. Changing a subscript changes the substance.

Front

What is the difference between a reactant and a product?

Back

Reactants are the starting substances in a chemical reaction, while products are the substances formed as a result of the reaction.

Front

What does it mean to balance a chemical reaction?

Back

Balancing a chemical reaction means adjusting the coefficients of the reactants and products so that the number of atoms of each element is the same on both sides.

Front

What is a skeleton equation?

Back

A skeleton equation is a chemical equation that shows the reactants and products but not the coefficients needed to balance it.

Front

What is the role of oxygen in combustion reactions?

Back

In combustion reactions, oxygen reacts with a fuel (usually a hydrocarbon) to produce carbon dioxide and water, releasing energy.