Oxidation Numbers in KOH

The video tutorial explains how to determine the oxidation numbers for each element in potassium hydroxide (KOH) using a set of rules and a periodic table. Potassium, being a group one element, has an oxidation number of +1. Oxygen typically has an oxidation number of -2, and hydrogen, when bonded to a non-metal like oxygen, has an oxidation number of +1. The video also highlights that KOH is a neutral compound, meaning the sum of its oxidation numbers equals zero. This is demonstrated by adding the oxidation numbers of potassium, oxygen, and hydrogen, which results in zero. The tutorial concludes with a summary of these points.

What is the oxidation number of elements in Group 1 of the periodic table?

• +1

• 0

• -1

• +2

Which element in KOH typically has an oxidation number of -2?

• Potassium

• Hydrogen

• Oxygen

• Helium

In KOH, what is the oxidation number of hydrogen when bonded to a non-metal?

• +2

• +1

• 0

• -1

What is the overall charge of a neutral compound like KOH?

• +1

• -1

• 0

• +2

How do the oxidation numbers in a neutral compound like KOH add up?

• They add up to +2

• They add up to 0

• They add up to -1

• They add up to +1

Which of the following statements is true about the oxidation numbers in KOH?

• Potassium has an oxidation number of -1

• Oxygen has an oxidation number of +2

• Hydrogen has an oxidation number of +1

• The sum of oxidation numbers is +1