Balancing Equations

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, following the law of conservation of mass.

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 elements in a compound?

Back

Count the different types of atoms present in the chemical formula of the compound.

Front

What is the law of conservation of mass?

Back

The law states that mass is neither created nor destroyed in a chemical reaction; the total mass of reactants equals the total mass of products.

Front

How do you balance the equation Fe2O3 + C → Fe + CO2?

Back

The balanced equation is 2 Fe2O3 + 3 C → 4 Fe + 3 CO2.

Front

What is the balanced form of KNO3 → KNO2 + O2?

Back

The balanced equation is 2 KNO3 → 2 KNO2 + O2.

Front

How do you balance the equation Na + CuSO4 → Na2SO4 + Cu?

Back

The balanced equation is 2 Na + 1 CuSO4 → 1 Na2SO4 + 1 Cu.

Front

What is the balanced form of CH4 + Cl2 → CCl4 + HCl?

Back

The balanced equation is 1 CH4 + 4 Cl2 → 1 CCl4 + 4 HCl.

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.