Oxidation Numbers in Chlorine Compounds

The video tutorial explains how to determine the oxidation numbers for elements in chlorine dioxide (ClO2). It begins by clarifying that ClO2 is a neutral compound, not an ion, and that the sum of oxidation numbers must equal zero. The tutorial then details how oxygen typically has an oxidation number of -2, and uses this information to calculate chlorine's oxidation number as +4. The process is summarized with a focus on understanding the rules and applying them to find oxidation numbers in neutral compounds.

What is the oxidation number of chlorine in the chlorite ion (ClO2-)?

• +4

• +3

• -1

• +1

In a neutral compound, what should the sum of the oxidation numbers of all elements equal?

• +1

• -1

• +2

• 0

What is the typical oxidation number of oxygen in compounds?

• -1

• -2

• +2

• +1

How many oxygen atoms are present in ClO2?

• One

• Two

• Three

• Four

Why can't chlorine have an oxidation number of -1 in ClO2?

• Because oxygen is more electronegative.

• Because it would not balance the compound to zero.

• Because chlorine is always positive.

• Because chlorine is in group 17.

Which rule is applied first when determining oxidation numbers in ClO2?

• The compound's neutrality

• Oxygen's typical oxidation state

• Chlorine's group number

• Chlorine's typical oxidation state

What is the oxidation number of oxygen in ClO2?

• +2

• +1

• -2

• -1

What is the oxidation number of chlorine in ClO2?

• +3

• +4

• -1

• +1

What is the final step in determining the oxidation number of chlorine in ClO2?

• Using the periodic table

• Solving an equation

• Checking the compound's charge

• Comparing with other compounds