Ferrous Sulfate and Iron Oxidation States

This video tutorial explains how to write the formula for ferrous sulfate, also known as iron II sulfate. It discusses the older and newer naming systems, focusing on the oxidation numbers of iron. The video guides viewers through determining the correct formula, FeSO4, by using the lower oxidation number for iron, which is +2, and combining it with the sulfate ion, SO4, which has a -2 charge. The tutorial concludes with a summary of the formula and its naming conventions.

What is the modern name for ferrous sulfate?

• Iron (III) sulfate

• Iron (II) sulfate

• Iron (IV) sulfate

• Iron (I) sulfate

What does the 'ous' suffix in ferrous indicate about iron's oxidation state?

• It indicates a variable oxidation state.

• It indicates no change in oxidation state.

• It indicates the lower oxidation state.

• It indicates the higher oxidation state.

Which oxidation state of iron is used in ferrous sulfate?

• +4

• +2

• +1

• +3

What is the charge of the sulfate ion in ferrous sulfate?

• -3

• -2

• -4

• -1

How do the charges of iron and sulfate combine in ferrous sulfate?

• Fe2+ and SO4 3- combine to form Fe2(SO4)3

• Fe3+ and SO4 3- combine to form FeSO4

• Fe3+ and SO4 2- combine to form Fe2(SO4)3

• Fe2+ and SO4 2- combine to form FeSO4

Why is ferrous sulfate also known as iron (II) sulfate?

• Because it contains iron in the +3 oxidation state

• Because it contains iron in the +2 oxidation state

• Because it contains iron in the 0 oxidation state

• Because it contains iron in the +1 oxidation state