Practicing Balancing Chemical Reactions

Front

What is a balanced chemical equation?

Back

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

Front

What are coefficients in a chemical equation?

Back

Coefficients are the numbers placed before 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 the coefficients needed to balance a chemical equation?

Back

To determine coefficients, count the number of atoms of each element on both sides of the equation and adjust the coefficients to make them equal.

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; the total mass of reactants equals the total mass of products.

Front

What is a skeleton equation?

Back

A skeleton equation is a chemical equation that shows the reactants and products in their chemical formulas but does not indicate the relative amounts of each substance.

Front

What is the first step in balancing a chemical equation?

Back

The first step is to write the unbalanced equation, listing all reactants and products with their correct chemical formulas.

Front

What does it mean for a reaction to be 'stoichiometric'?

Back

A stoichiometric reaction is one where the reactants are present in exact proportions as dictated by the balanced chemical equation.

Front

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

Back

Subscripts indicate the number of atoms of each element in a molecule; they are fixed and cannot be changed when balancing equations.

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

How do you balance a combustion reaction?

Back

To balance a combustion reaction, ensure that the number of carbon, hydrogen, and oxygen atoms in the products matches those in the reactants.