Oxidation Numbers and Compounds

The video tutorial explains how to find oxidation numbers for each element in H3AsO4. It starts by noting that the compound is neutral, meaning all oxidation numbers add up to zero. Hydrogen is assigned a +1 oxidation number, while oxygen is typically -2. The video then sets up an equation to find the oxidation number of arsenic, which is determined to be +5. The tutorial concludes by verifying that the sum of all oxidation numbers equals zero, confirming the compound's neutrality.

What is the overall charge of the compound H3AsO4?

• Variable

• Negative

• Neutral

• Positive

What is the oxidation number assigned to each hydrogen atom in H3AsO4?

• -1

• 0

• +1

• +2

What is the typical oxidation number for oxygen in compounds?

• 0

• +2

• -1

• -2

How many oxygen atoms are present in H3AsO4?

• 3

• 5

• 2

• 4

What is the oxidation number of arsenic in H3AsO4?

• -5

• -3

• +5

• +3

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

• 0

• +1

• -1

• +2