Balancing Chemical Reactions and Products

Dr. B explains how to balance the chemical equation Na + H2O yields NaOH + H2. The process involves counting the atoms on each side, adjusting coefficients to achieve balance, and ensuring even numbers for easier balancing. The video concludes with an explanation of the reaction's explosive nature due to hydrogen gas ignition.

What is the initial chemical equation discussed in the video?

• Na + H2O yields NaOH + H2

• Na + O2 yields Na2O

• H2 + O2 yields H2O

• NaOH + H2 yields Na + H2O

How many hydrogen atoms are initially present on the reactants side?

• One

• Three

• Four

• Two

What is the first step suggested to balance the equation?

• Add a coefficient of 2 in front of NaOH

• Add a coefficient of 2 in front of Na

• Add a coefficient of 3 in front of H2O

• Add a coefficient of 3 in front of NaOH

After adjusting the coefficients, how many total hydrogen atoms are there?

• Five

• Three

• Four

• Two

What is the final step to balance the oxygen atoms?

• Add a coefficient of 3 in front of H2O

• Add a coefficient of 3 in front of NaOH

• Add a coefficient of 2 in front of Na

• Add a coefficient of 2 in front of H2O

What is the trick mentioned for balancing equations with odd numbers?

• Remove products

• Add more reactants

• Convert odd numbers to even numbers

• Use a catalyst

What happens when hydrogen gas is ignited in the reaction?

• It becomes sodium

• It turns into oxygen

• It creates a spark

• It forms water

What is the product formed along with sodium hydroxide in the reaction?

• Sodium chloride

• Water

• Hydrogen gas

• Oxygen gas

Why is the reaction described as explosive?

• Because it releases hydrogen gas

• Because it absorbs energy

• Because it produces a lot of heat

• Because it forms a solid product

What is the role of oxygen in the explosive reaction?

• It remains unreacted

• It acts as a catalyst

• It combines with hydrogen gas

• It forms a new compound