Oxidation Numbers in Compounds

This video tutorial explains how to calculate the oxidation number of phosphorus in the compound Na3PO4, also known as sodium phosphate. It begins by identifying the oxidation states of sodium and oxygen, which are +1 and -2, respectively. The tutorial then formulates a mathematical expression to solve for the unknown oxidation number of phosphorus. By solving the equation, it is determined that the oxidation number of phosphorus is +5. The video concludes with a recap of the calculation process.

What is the oxidation number of sodium in Na3PO4?

• -1

• 0

• +2

• +1

What is the typical oxidation number of oxygen in compounds?

• +2

• 0

• -2

• +1

How many sodium atoms are present in Na3PO4?

• 1

• 2

• 4

• 3

What is the expression used to calculate the oxidation number of phosphorus in Na3PO4?

• 3 + x - 8 = 0

• 3 - x + 8 = 0

• 3x - 8 = 0

• x + 8 = 3

What is the oxidation number of phosphorus in Na3PO4 after solving the expression?

• +3

• +5

• -5

• -3

What is the sum of the oxidation numbers of all atoms in a neutral compound?

• +1

• 0

• -1

• +2

Which method can be used to verify the oxidation number of phosphorus in Na3PO4?

• Graphical method

• Trial and error

• Using a calculator

• Mental calculation