Balancing Equations

Front

What is a balanced equation?

Back

A balanced 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

How do you balance a chemical equation?

Back

To balance a chemical equation, adjust the coefficients (the numbers in front of compounds) to ensure that the number of atoms for each element is the same on both sides.

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

What is the law of conservation of mass?

Back

The law of conservation of mass states that mass cannot be created or destroyed in a chemical reaction; it can only change forms.

Front

What is the chemical formula for glucose?

Back

C6H12O6.

Front

How many oxygen atoms are in the formula C6H12O6?

Back

6 oxygen atoms.

Front

Is the equation Al + O2 → Al2O3 balanced?

Back

No, it is unbalanced.

Front

Balance the equation: __ Al + __ HCl → __ H2 + __ AlCl3.

Back

2 Al + 6 HCl → 3 H2 + 2 AlCl3.

Front

Balance the equation: 2Li + Cl2 → __ LiCl.

Back

2Li + Cl2 → 2LiCl.

Front

What is a reactant in a chemical reaction?

Back

A reactant is a substance that undergoes change during a chemical reaction.