Balancing Chemical Equations

The video tutorial demonstrates how to balance the chemical equation PbO + C yields Pb + CO2. It begins by identifying the initial atom counts on both sides of the equation, highlighting the imbalance in oxygen atoms. The tutorial then explains how to adjust the coefficients to balance the equation, ensuring that the number of atoms for each element is equal on both sides. The process involves changing the coefficient in front of PbO and Pb to achieve balance. The video concludes with a confirmation that the equation is balanced.

What is the initial count of oxygen atoms on the product side of the equation PbO + C yields Pb + CO2?

• One

• Two

• Three

• Four

What change is made to balance the oxygen atoms in the equation?

• Add a coefficient of 3 in front of PbO

• Add a coefficient of 2 in front of PbO

• Add a coefficient of 2 in front of CO2

• Add a coefficient of 3 in front of CO2

After balancing the oxygen atoms, what is the next step to balance the equation?

• Add a coefficient of 3 in front of Pb

• Add a coefficient of 2 in front of C

• Add a coefficient of 2 in front of Pb

• Add a coefficient of 3 in front of C

What is the final balanced equation for PbO + C yields Pb + CO2?

• 2PbO + C yields Pb + 2CO2

• PbO + 2C yields Pb + 2CO2

• 2PbO + C yields 2Pb + CO2

• PbO + C yields Pb + CO2

Why is it necessary to adjust the coefficients in a chemical equation?

• To change the substances involved

• To balance the number of atoms on both sides

• To increase the reaction speed

• To decrease the reaction speed