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 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 equal on both sides.

Front

What is the law of conservation of mass?

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 before the compounds in a chemical equation to indicate how many molecules or moles of each substance are involved in the reaction.

Front

How do you determine the coefficients needed to balance a chemical equation?

Back

To determine coefficients, count the number of atoms of each element in the reactants and products, then adjust the coefficients to make them equal.

Front

What is the first step in balancing a chemical equation?

Back

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

Front

What is a combustion reaction?

Back

A combustion reaction is a chemical reaction that occurs when a substance combines with oxygen, releasing energy in the form of light and heat.

Front

What is the general form of a combustion reaction involving hydrocarbons?

Back

The general form is: Hydrocarbon + O2 → CO2 + H2O.

Front

What is the significance of the coefficients in a balanced equation?

Back

Coefficients indicate the relative amounts of reactants and products involved in the reaction, which is essential for stoichiometric calculations.

Front

What is a decomposition reaction?

Back

A decomposition reaction is a type of chemical reaction where one compound breaks down into two or more simpler substances.