Balancing Chemical Equations

The video tutorial explains how to balance the chemical equation Fe2S3 + HCl. It begins by counting the atoms on each side of the equation and proceeds to balance the iron, chlorine, sulfur, and hydrogen atoms using coefficients. The process involves adjusting the coefficients to ensure the same number of each type of atom appears on both sides of the equation. The tutorial concludes with a balanced equation and a brief sign-off by Dr. B.

What are the initial counts of iron, sulfur, hydrogen, and chlorine atoms on the reactant side of the equation?

• 1 iron, 3 sulfur, 1 hydrogen, 1 chlorine

• 2 iron, 3 sulfur, 2 hydrogen, 3 chlorine

• 1 iron, 1 sulfur, 2 hydrogen, 3 chlorine

• 2 iron, 3 sulfur, 1 hydrogen, 1 chlorine

What is the first step taken to balance the equation?

• Balancing sulfur atoms

• Balancing hydrogen atoms

• Balancing chlorine atoms

• Balancing iron atoms

After balancing iron, how many chlorine atoms are present on the reactant side?

• 2 chlorine atoms

• 3 chlorine atoms

• 6 chlorine atoms

• 8 chlorine atoms

What coefficient is placed in front of H2S to balance sulfur atoms?

• 3

• 4

• 1

• 2

How many hydrogen atoms are present after balancing the equation?

• 4 hydrogen atoms

• 6 hydrogen atoms

• 8 hydrogen atoms

• 2 hydrogen atoms

What is the final balanced equation for the reaction?

• Fe2S3 + 8HCl → 2FeCl3 + 3H2S

• Fe2S3 + 6HCl → 2FeCl3 + 6H2S

• Fe2S3 + 3HCl → 2FeCl3 + 3H2S

• Fe2S3 + 6HCl → 2FeCl3 + 3H2S