Balancing Equations

Front

What is a Reactant in a chemical equation?

Back

A reactant is a substance that undergoes a chemical change in a reaction, found on the left side of the equation.

Front

What does a Subscript indicate in a chemical formula?

Back

A subscript indicates the number of atoms of an element in a molecule, placed to the lower right of the element's symbol.

Front

How many Hydrogen (H) atoms are in NH₃O₅?

Back

3

Front

What is the balanced equation for Al + HCl → H₂ + AlCl₃?

Back

2 Al + 6 HCl → 3 H₂ + 2 AlCl₃

Front

How do you balance the equation MgCl₂ → Mg₄ + Cl₂?

Back

4 MgCl₂ → Mg₄ + 4 Cl₂

Front

What is a Coefficient in a chemical equation?

Back

A coefficient is a number placed in front of a compound in a chemical equation to indicate how many molecules or moles of that compound are involved.

Front

What is a Product in a chemical equation?

Back

A product is a substance that is formed as a result of a chemical reaction, found on the right side of the equation.

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, following the law of conservation of mass.

Front

What is the purpose of balancing chemical equations?

Back

The purpose is to ensure that the same number of atoms of each element is present on both sides of the equation, reflecting the conservation of mass.

Front

What is the first step in balancing a chemical equation?

Back

The first step is to write down the number of atoms of each element present in the reactants and products.