Oxidation Numbers in Compounds

This video tutorial teaches how to determine oxidation numbers for elements in chemical compounds. It starts with basic examples like CaO and CuI, progresses to intermediate examples such as FeBr3 and NH4Cl, and covers advanced cases like CO3 2- and Ba2+. The tutorial also explores unique cases like KClO3 and H2O2, and concludes with final examples including NaBH4 and BrF5. Throughout, the video emphasizes rules for calculating oxidation numbers, using the periodic table as a guide.

What is the oxidation number of calcium in CaO?

• +1

• +2

• -2

• -1

In the compound CuI, what is the oxidation number of iodine?

• +1

• -1

• +2

• -2

For the compound FeBr3, what is the oxidation number of iron?

• +3

• +2

• -3

• +1

In NH4Cl, what is the oxidation number of nitrogen?

• -3

• +5

• -5

• +3

What is the oxidation number of carbon in the polyatomic ion CO3^2-?

• -4

• -2

• +4

• +2

In the compound Ba^2+, what is the oxidation number of barium?

• +2

• -1

• +1

• -2

What is the oxidation number of phosphorus in H2P2O7^2-?

• +3

• +5

• +7

• +10

In KClO3, what is the oxidation number of chlorine?

• +5

• +3

• +1

• -1

What is the oxidation number of oxygen in hydrogen peroxide (H2O2)?

• -1

• -2

• +2

• +1

In the compound BrF5, what is the oxidation number of bromine?

• +1

• +3

• +5

• -1