Oxidation Numbers and Iron Compounds

The video tutorial explains how to find oxidation numbers in FeSO4 using general rules. It highlights that in a neutral compound, oxidation numbers add up to zero. The tutorial discusses transition metals like iron and sulfur, which are not on the list of common oxidation states. It explains that SO4 is a polyatomic ion with a charge of two minus, and oxidation numbers in ions add up to the ion's charge. The video demonstrates calculating the oxidation numbers for iron and sulfur in FeSO4, concluding that sulfur has an oxidation number of plus six, and each oxygen has minus two. The tutorial ends with a summary of the oxidation numbers for each element in FeSO4, known as iron II sulfate.

What is the sum of oxidation numbers in a neutral compound?

• It is always positive.

• It is always zero.

• It varies depending on the compound.

• It is always negative.

Why is iron not listed with a specific oxidation number?

• It does not participate in oxidation reactions.

• It is a transition metal with multiple oxidation states.

• It is always in the +2 state.

• It is a non-metal.

What is the charge of the sulfate ion (SO4)?

• 2+

• 2-

• 1-

• 3-

How do the oxidation numbers in a polyatomic ion relate to its charge?

• They are always negative.

• They are always positive.

• They add up to the charge of the ion.

• They add up to zero.

What is the oxidation number of sulfur in the sulfate ion?

• 0

• -2

• +6

• +4

What is the oxidation number of oxygen in most compounds?

• +2

• -1

• -2

• 0

How many oxygen atoms are present in the sulfate ion?

• 3

• 4

• 2

• 5

What is the oxidation number of iron in FeSO4?

• +1

• +2

• +3

• 0

What is the overall oxidation number of FeSO4 as a compound?

• +2

• -2

• 0

• +4

What is the name of the compound FeSO4?

• Iron(III) sulfate

• Iron(II) sulfate

• Iron(I) sulfate

• Iron(IV) sulfate