Oxidation Numbers and Their Calculations

This video tutorial explains how to determine the oxidation number of nitrogen in the HNO2 molecule, also known as nitrous acid. It begins by discussing the concept of oxidation numbers and the neutrality of molecules. The video then details the oxidation numbers for hydrogen and oxygen, followed by a step-by-step calculation of nitrogen's oxidation number using both direct calculation and algebraic methods. The tutorial concludes with a summary of the findings.

What is the oxidation number of a neutral molecule?

• It depends on the molecule.

• It is always negative.

• It is always positive.

• It is zero.

What is the typical oxidation number for hydrogen when bonded to nonmetals?

• -1

• 0

• +1

• +2

What is the usual oxidation number for oxygen in compounds?

• 0

• -2

• +2

• -1

How do you calculate the oxidation number of nitrogen in HNO2?

• By guessing based on the molecule's name.

• By using the known oxidation numbers of hydrogen and oxygen.

• By assuming it is zero.

• By using the periodic table.

What is the oxidation number of nitrogen in HNO2?

• +4

• +3

• +2

• +1

In the algebraic method, what variable is used to represent the unknown oxidation number of nitrogen?

• x

• n

• z

• y

What is the sum of oxidation numbers in a neutral molecule?

• It is equal to zero.

• It is equal to the molecular weight.

• It is equal to the atomic number.

• It is equal to the number of atoms.

What is the purpose of adding 3 to both sides in the algebraic method?

• To find the oxidation number of oxygen.

• To balance the equation.

• To find the oxidation number of hydrogen.

• To find the oxidation number of nitrogen.