Oxidation Numbers in NH3

The video tutorial explains how to determine the oxidation numbers of elements in ammonia (NH3). It begins by identifying the elements present, hydrogen and nitrogen, and applies general rules to find their oxidation numbers. Hydrogen, when bonded to a non-metal like nitrogen, has an oxidation number of +1. Since NH3 is a neutral compound, the sum of oxidation numbers must equal zero. Therefore, nitrogen's oxidation number is calculated to be -3. The video concludes with a recap of the process used to find these oxidation numbers.

What is the primary focus of this video tutorial?

• Balancing chemical equations

• Finding oxidation numbers in NH3

• Understanding molecular geometry

• Learning about acids and bases

When hydrogen is bonded to a non-metal, what is its typical oxidation number?

• +1

• +2

• -1

• 0

How many hydrogen atoms are present in an NH3 molecule?

• One

• Two

• Four

• Three

What is the oxidation number of nitrogen in NH3?

• +1

• +3

• 0

• -3

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

• +1

• 0

• -1

• +2

Which element in NH3 has a negative oxidation number?

• Carbon

• Oxygen

• Nitrogen

• Hydrogen

What is the significance of the oxidation numbers adding up to zero in NH3?

• It indicates the molecule is an ion.

• It suggests the molecule is basic.

• It confirms the molecule is neutral.

• It shows the molecule is acidic.