Balancing Chemical Equations

The video tutorial demonstrates how to balance a chemical equation involving ammonia (NH3) and oxygen (O2) to produce nitrogen gas (N2) and water (H2O). The instructor begins by counting the atoms on each side of the equation and identifies the need to balance nitrogen first. By adjusting coefficients, the instructor balances nitrogen, then moves on to balance hydrogen and oxygen. The process involves making numbers even and requires several adjustments to achieve a balanced equation. The tutorial concludes with a strategy explanation, emphasizing the importance of converting odd numbers to even for successful balancing.

What are the initial counts of nitrogen, hydrogen, and oxygen atoms on the reactant side?

• 1 nitrogen, 3 hydrogen, 2 oxygen

• 2 nitrogen, 3 hydrogen, 1 oxygen

• 2 nitrogen, 1 hydrogen, 3 oxygen

• 1 nitrogen, 2 hydrogen, 3 oxygen

What is the first step taken to balance the nitrogen atoms?

• Add a coefficient of 3 in front of NH3

• Add a coefficient of 1 in front of NH3

• Add a coefficient of 2 in front of NH3

• Add a coefficient of 4 in front of NH3

After balancing nitrogen, what is the next step to address the hydrogen atoms?

• Multiply the water by 5

• Multiply the water by 3

• Multiply the water by 4

• Multiply the water by 2

Why is it necessary to get the oxygen count to be an even number?

• To balance the nitrogen atoms

• To balance the equation overall

• To balance the hydrogen atoms

• To balance the oxygen atoms on both sides

What coefficient is placed in front of H2O to balance the hydrogen atoms?

• 4

• 3

• 2

• 6

What coefficient is placed in front of NH3 to balance the hydrogen atoms?

• 2

• 3

• 6

• 4

What is the final coefficient placed in front of N2 to balance the nitrogen atoms?

• 4

• 3

• 2

• 1

What is the balanced chemical equation for the reaction?

• 4 NH3 + 3 O2 → 2 N2 + 6 H2O

• 2 NH3 + 3 O2 → 2 N2 + 6 H2O

• 4 NH3 + 3 O2 → 2 N2 + 6 H2O

• 4 NH3 + 6 O2 → 2 N2 + 6 H2O

What was the main strategy used to balance the equation?

• Using trial and error

• Getting odd numbers to be even

• Balancing hydrogen atoms first

• Balancing oxygen atoms first

What is the final count of hydrogen atoms on both sides of the balanced equation?

• 10

• 12

• 8

• 6