Ionic Charges and Oxidation States

The video tutorial explains how to determine the oxidation numbers for each element in the compound CO3 N2, known as Cobalt 2 nitride. It begins by discussing the nature of neutral compounds and how their oxidation numbers sum to zero. The tutorial then focuses on the special rules for determining the oxidation number of nitrogen, given its electronegativity and ionic charge. The calculation process is detailed, showing how the oxidation numbers for Cobalt and Nitrogen are derived, ensuring the sum equals zero. The video concludes with a summary of the findings.

What is the charge of a neutral compound like Cobalt(II) Nitride?

• Positive

• Negative

• Depends on the elements

• Zero

Why is it challenging to determine the oxidation number of Cobalt directly?

• Cobalt is not bonded to any element

• Cobalt has a fixed oxidation state

• Cobalt is a transition metal

• Cobalt is a non-metal

What is the ionic charge of Nitrogen used in the calculation?

• 3-

• 4-

• 1-

• 2-

How many Nitrogen atoms are present in Cobalt(II) Nitride?

• 1

• 2

• 3

• 4

What is the oxidation number of each Cobalt atom in Cobalt(II) Nitride?

• +1

• +2

• +3

• +4

What is the total oxidation number for all the elements in a neutral compound?

• It is always negative

• It is always positive

• It varies

• It is zero