Oxidation States and Numbers

The video tutorial explains how to determine the oxidation number of bromine in the ion BrO2-. It begins by identifying the ion and its charge, then sets up an equation using known oxidation states, such as oxygen's typical -2 state. The tutorial walks through solving the equation to find bromine's oxidation number, which is +3. The video concludes with a brief summary and thanks viewers for watching.

What is the charge of the BrO2- ion?

• 0

• -1

• -2

• +1

In an ion, the sum of the oxidation numbers of all atoms is equal to:

• Zero

• The total number of atoms in the ion

• The atomic number of the central atom

• The charge of the ion

What is the usual oxidation state of oxygen in compounds?

• +2

• -2

• -1

• +1

How do you represent the unknown oxidation number of bromine in the equation?

• As a constant

• As a fraction

• As a negative number

• As a variable 'x'

What is the oxidation number of bromine in BrO2- after solving the equation?

• +3

• -1

• -3

• +1

Which of the following is a correct step in solving for the oxidation number of bromine in BrO2-?

• Subtract 4 from both sides

• Add 4 to both sides

• Multiply both sides by 2

• Divide both sides by 2