Oxidation Numbers and Their Properties

This video tutorial explains how to determine the oxidation numbers for each element in ammonium sulfate (NH4)2SO4. It begins by discussing the rules for oxidation numbers in neutral compounds and ions. The video then breaks down the oxidation numbers for the ammonium ion (NH4) and the sulfate ion (SO4) separately, using equations to solve for unknown oxidation states. The tutorial concludes by summarizing the oxidation numbers for each element in the compound, ensuring they add up to zero, confirming the compound's neutrality.

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

• It is always negative.

• It is always positive.

• It is always zero.

• It equals the charge of the compound.

What is the oxidation number of the ammonium ion?

• -2

• +1

• +2

• -1

How does the oxidation number of sulfate compare to its charge?

• It is double the charge.

• It is unrelated to the charge.

• It is half the charge.

• It is the same as the charge.

What is the oxidation number of hydrogen when bonded to non-metals?

• -1

• +2

• +1

• 0

What equation helps determine the oxidation number of nitrogen in NH4+?

• x + 4 = -1

• x - 4 = +1

• x + 4 = +1

• x + 4 = 0

What is the oxidation number of nitrogen in the ammonium ion?

• +5

• +3

• -3

• -5

What is the oxidation number of oxygen in most compounds?

• +1

• +2

• 0

• -2

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

• +6

• -4

• -6

• +4

What is the overall charge of ammonium sulfate?

• +1

• +2

• -1

• 0

What is the sum of oxidation numbers for all elements in ammonium sulfate?

• +2

• +1

• -2

• 0