Oxidation Numbers in Compounds

The video tutorial explains how to find the oxidation numbers for each element in sodium hydrogen phosphate (NaH2PO4). It begins by identifying the compound as neutral, meaning the oxidation numbers must sum to zero. The tutorial outlines the oxidation numbers for sodium and hydrogen, and uses rules to determine oxygen's oxidation number. Phosphorus is assigned a variable, and an equation is formed to solve for its oxidation number. The tutorial concludes by verifying that the calculated oxidation numbers sum to zero, confirming the compound's neutrality.

What is the significance of oxidation numbers in a neutral compound like NaH2PO4?

• They always add up to the atomic number of the compound.

• They always add up to a positive number.

• They always add up to a negative number.

• They always add up to zero.

What is the oxidation number of sodium in NaH2PO4?

• +2

• 0

• -1

• +1

Which element's oxidation number is unknown in NaH2PO4?

• Phosphorus

• Oxygen

• Hydrogen

• Sodium

What is the oxidation number of oxygen typically, with few exceptions?

• +2

• -1

• -2

• +1

How do you represent the unknown oxidation number of phosphorus in the equation?

• x

• z

• p

• y

What is the result of the equation used to find the oxidation number of phosphorus?

• x = 0

• x = +3

• x = -5

• x = +5

What is the oxidation number of phosphorus in NaH2PO4?

• -3

• 0

• +5

• +3

Why do the oxidation numbers in NaH2PO4 add up to zero?

• Because it is a neutral compound.

• Because it is a charged compound.

• Because it is an ionic compound.

• Because it is a covalent compound.

Who is the presenter of the video on oxidation numbers in sodium hydrogen phosphate?

• Dr. A

• Dr. C

• Dr. B

• Dr. D