Balancing Equations

Front

What is the reactant side of a chemical equation?

Back

The left side of a chemical equation, which contains the substances that undergo a chemical change.

Front

What does it mean for a chemical equation to be balanced?

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.

Front

How many atoms are in H₂SO₄?

Back

There are 7 atoms in total: 2 Hydrogen (H), 1 Sulfur (S), and 4 Oxygen (O).

Front

How do you balance the equation CF₄ + Br₂ → CBr₄ + F₂?

Back

The balanced equation is 1 CF₄ + 2 Br₂ → 1 CBr₄ + 2 F₂.

Front

How many HCl molecules are needed to react with Mg in the equation Mg + ___ HCl → MgCl₂ + H₂?

Back

2 HCl molecules are needed.

Front

What is a chemical equation?

Back

A representation of a chemical reaction that shows the reactants and products, along with their quantities.

Front

What is the law of conservation of mass?

Back

In a chemical reaction, mass is neither created nor destroyed; the total mass of reactants equals the total mass of products.

Front

What is a coefficient in a chemical equation?

Back

A number placed in front of a chemical formula to indicate how many molecules or moles of that substance are involved in the reaction.

Front

What is a subscript in a chemical formula?

Back

A number written below and to the right of a chemical symbol that indicates the number of atoms of that element in a molecule.

Front

What is the purpose of balancing chemical equations?

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.