Oxidation Numbers and Compounds

This video tutorial explains how to determine the oxidation numbers for each element in copper(II) sulfate pentahydrate (CuSO4·5H2O). It breaks down the compound into copper sulfate and water molecules, calculating the oxidation numbers for copper, sulfur, and oxygen in CuSO4, and hydrogen and oxygen in water. The video emphasizes the neutrality of the compound and the charge balance in the sulfate ion, providing a step-by-step calculation for sulfur's oxidation number.

What is the compound discussed in the video?

• Magnesium Oxide

• Potassium Permanganate

• Sodium Chloride

• Copper(II) Sulfate Pentahydrate

How many water molecules are associated with Copper Sulfate in the compound?

• Five

• Three

• Nine

• Seven

What is the oxidation number of copper in Copper Sulfate?

• +1

• +2

• +3

• +4

What is the charge of the sulfate ion in Copper Sulfate?

• -3

• -2

• -1

• 0

What is the oxidation number of sulfur in Copper Sulfate?

• +4

• +5

• +7

• +6

How many oxygen atoms are present in the sulfate ion?

• Two

• Four

• Three

• Five

What is the oxidation number of hydrogen in water?

• 0

• -1

• +1

• +2

What is the oxidation number of oxygen in water?

• 0

• +1

• -1

• -2

Does the number of water molecules affect the oxidation numbers of hydrogen and oxygen?

• Only hydrogen changes

• Only oxygen changes

• No, it remains the same

• Yes, it changes them

What is the overall charge of the Copper(II) Sulfate Pentahydrate compound?

• -2

• +1

• 0

• -1