Balancing Chemical Equations

In this video, Dr. B demonstrates how to balance the chemical equation KCN + H2SO4. The process begins with counting the atoms on both the reactant and product sides. Initially, the potassium atoms are unbalanced, so a coefficient of 2 is added to KCN. This adjustment is then mirrored on the product side by adding a coefficient of 2 to HCN, ensuring all atoms are balanced. The video concludes with a balanced equation and a brief summary.

What is the initial number of potassium atoms on the reactant side of the equation?

• One

• Two

• Three

• Four

Which element is balanced first in the equation?

• Potassium

• Nitrogen

• Carbon

• Hydrogen

After balancing potassium, what is the coefficient of KCN?

• 1

• 2

• 4

• 3

What is the next element balanced after potassium?

• Sulfur

• Hydrogen

• Carbon

• Oxygen

How many nitrogen atoms are there on the product side after balancing?

• Four

• One

• Two

• Three

What is the coefficient of HCN on the product side after balancing?

• 1

• 2

• 3

• 4

What is the final step to confirm the equation is balanced?

• Check the number of sulfur atoms

• Check the number of oxygen atoms

• Check the number of carbon atoms

• Check the number of hydrogen atoms