Balancing Equations Practice

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 a chemical reaction.

Front

What does the coefficient in a chemical equation represent?

Back

The coefficient indicates the number of molecules or moles of a substance involved in the reaction.

Front

How do you determine the number of molecules produced in a reaction?

Back

By balancing the chemical equation, you can find the coefficients that indicate the number of molecules produced for each substance.

Front

What is the first step in balancing a chemical equation?

Back

Identify the number of atoms of each element in the reactants and products.

Front

What is the law of conservation of mass?

Back

The law states that mass cannot be created or destroyed in a chemical reaction; therefore, the mass of reactants must equal the mass of products.

Front

How do you balance the equation C2H6 + O2 → H2O + CO2?

Back

By adjusting the coefficients to ensure the same number of each type of atom on both sides, you find that 2 H2O and 2 CO2 are produced.

Front

What is the balanced form of SnO2 + H2 → Sn + H2O?

Back

1 SnO2 + 2 H2 → 1 Sn + 2 H2O.

Front

What is the significance of subscripts in a chemical formula?

Back

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

Front

What is the balanced equation for Fe + H2SO4 → Fe2(SO4)3 + H2?

Back

2 Fe + 6 H2SO4 → 1 Fe2(SO4)3 + 3 H2.

Front

How do you balance the equation BF3 + Li2SO3 → B2(SO3)3 + LiF?

Back

2 BF3 + 3 Li2SO3 → 1 B2(SO3)3 + 6 LiF.