Ferric Sulfide Chemical Properties

This video tutorial explains how to name ferric sulfide using both older and modern naming systems. It discusses the oxidation numbers for iron, highlighting the use of the higher oxidation number in the older system. The tutorial demonstrates the crisscross method to balance charges and derive the correct chemical formula, Fe2S3, for ferric sulfide. The video concludes by verifying the formula to ensure a net charge of zero, confirming its accuracy.

What is the modern name for ferric sulfide?

• Iron V sulfide

• Iron II sulfide

• Iron III sulfide

• Iron IV sulfide

In the older naming system, what does the suffix 'ic' indicate about the oxidation state of iron?

• Variable oxidation state

• Higher oxidation state

• Neutral oxidation state

• Lower oxidation state

What is the oxidation state of iron in ferric sulfide?

• +4

• +1

• +2

• +3

What is the oxidation state of sulfur in ferric sulfide?

• -4

• -3

• -2

• -1

Which method is used to balance the charges in the formula of ferric sulfide?

• Elimination method

• Addition method

• Crisscross method

• Substitution method

What is the chemical formula for ferric sulfide?

• FeS2

• Fe2S

• Fe2S3

• FeS

How do you verify the correctness of the chemical formula for ferric sulfide?

• By checking the color

• By checking the volume

• By checking the net charge

• By checking the mass

What should the net charge be for a correctly balanced chemical formula?

• +1

• -1

• +2

• 0