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, 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 many atoms of Aluminum are in Al₂O₃?

Back

2

Front

What is the total number of Oxygen atoms in Al₂(SO₄)₃?

Back

12

Front

How many Hydrogen atoms are in H₂O?

Back

2

Front

What is the purpose of balancing a chemical equation?

Back

To ensure that the same number of each type of atom is present on both sides of the equation, reflecting the conservation of mass.

Front

What is the balanced equation for the reaction of Zinc and Hydrochloric acid?

Back

Zn + 2HCl → ZnCl₂ + H₂

Front

What is the balanced equation for the reaction of Sodium and Chlorine gas?

Back

2Na + Cl₂ → 2NaCl

Front

What is the significance of subscripts in a chemical formula?

Back

Subscripts indicate the number of atoms of each element in a molecule.

Front

What is the difference between a reactant and a product in a chemical reaction?

Back

Reactants are substances that undergo a chemical change, while products are the substances formed as a result of the reaction.