Oxidation Numbers in K2SO3

The video tutorial explains how to determine the oxidation numbers for each element in potassium sulfite (K2SO3). It begins by identifying the compound as neutral, meaning the oxidation numbers must sum to zero. Potassium, being in group one, has an oxidation number of +1. Sulfur's oxidation number is unknown initially, while oxygen is typically -2. An equation is set up to solve for sulfur's oxidation number, resulting in +4. The video concludes by verifying the calculations, ensuring the sum of oxidation numbers equals zero.

What is the overall charge of the compound K2SO3?

• Positive

• Negative

• Neutral

• Variable

What is the oxidation number of potassium in K2SO3?

• -1

• +1

• +2

• 0

Why is sulfur's oxidation number initially left as 'x'?

• It always has a fixed value

• It is always negative

• It is always zero

• It varies depending on the compound

What is the typical oxidation number for oxygen in compounds?

• 0

• -2

• -1

• +2

How is the equation set up to find the oxidation number of sulfur in K2SO3?

• 2(-1) + x + 3(+2) = 0

• x + 3(+2) = 0

• 2(+1) + x + 3(-2) = 0

• 2x + 3(-2) = 0

What is the oxidation number of sulfur in K2SO3 after solving the equation?

• 0

• +4

• +6

• -2

What is the sum of oxidation numbers in a neutral compound like K2SO3?

• +2

• +4

• 0

• -2

How do the oxidation numbers of all elements in K2SO3 verify the neutrality of the compound?

• They add up to -2

• They add up to +2

• They add up to +4

• They add up to 0

Who is the presenter of the video on oxidation numbers for potassium sulfite?

• Dr. A

• Dr. B

• Dr. C

• Dr. D