Balancing Chemical Equations

This video tutorial demonstrates how to balance the chemical equation Al + S8 yields Al2S3. It begins by counting the atoms on both sides of the equation and identifying the challenge of balancing the sulfur atoms. The instructor suggests using a common multiple to balance the sulfur atoms and then adjusts the aluminum atoms accordingly. The video concludes with a balanced equation and emphasizes the importance of finding common numbers to solve similar problems.

What is the chemical equation being balanced in this video?

• Al2 + S8 → AlS3

• Al + S → Al2S3

• Al + S8 → Al2S3

• Al + S8 → AlS

How many sulfur atoms are present on the reactant side initially?

• 24

• 3

• 8

• 16

What is the initial imbalance in the equation?

• Too few sulfur atoms on the product side

• Too many sulfur atoms on the reactant side

• Too few aluminum atoms on the reactant side

• Too many aluminum atoms on the product side

What common multiple is used to balance the sulfur atoms?

• 24

• 48

• 16

• 32

What coefficient is placed in front of S8 to balance the sulfur atoms?

• 8

• 24

• 3

• 16

What coefficient is placed in front of Al to balance the aluminum atoms?

• 32

• 16

• 24

• 8

What is the final balanced equation for the reaction?

• 3Al + 8S8 → 24Al2S3

• 16Al + 3S8 → 8Al2S3

• 8Al + 3S8 → 16Al2S3

• 24Al + 8S8 → 3Al2S3

What is a useful strategy when faced with an odd number of atoms on one side of the equation?

• Add more reactants

• Find a common multiple

• Remove some products

• Ignore the imbalance