Balancing Chemical Equations

The video tutorial demonstrates how to balance a chemical equation involving lead carbonate and oxygen gas. It begins by counting the atoms on both sides of the equation and then uses coefficients to balance the equation. The tutorial introduces a method using fractional coefficients to simplify the balancing process, which can be converted to whole numbers if needed. The video concludes with a balanced equation and offers tips for efficient balancing.

What is the initial count of oxygen atoms on the reactant side before balancing?

• 4

• 2

• 5

• 3

How many lead atoms are present on the product side initially?

• 3

• 1

• 2

• 4

What coefficient is used to balance the lead atoms?

• 1

• 2

• 3

• 4

After balancing lead and carbon, what is the total count of oxygen atoms on the product side?

• 9

• 11

• 10

• 12

What is the problem encountered with the oxygen atoms after initial balancing?

• Too many on product side

• Equal on both sides

• Too few on product side

• Too many on reactant side

What is the fractional coefficient used for O2 to balance the equation?

• 1/4

• 1/3

• 2/3

• 1/2

What is the total number of oxygen atoms after using the fractional coefficient?

• 10

• 12

• 9

• 11

What is the whole number coefficient for PbCO3 after converting from fractional coefficients?

• 6

• 2

• 3

• 4

What is the whole number coefficient for O2 after conversion?

• 1

• 4

• 2

• 3

What is the final balanced equation for PbCO3 plus O2?

• PbCO3 + O2 -> PbO + CO2

• 6PbCO3 + 3O2 -> 6PbO + 6CO2

• 3PbCO3 + 1.5O2 -> 3PbO + 3CO2

• 2PbCO3 + O2 -> 2PbO + 2CO2