Oxidation Numbers in Methanol

The video tutorial explains how to determine the oxidation numbers for each element in CH3OH (methanol). It begins by introducing the concept and the general rules for assigning oxidation numbers, such as hydrogen being +1 and oxygen being -2. The tutorial then demonstrates how to calculate the oxidation number for carbon in a neutral compound, ensuring that the sum of oxidation numbers equals zero. The video concludes with a recap of the process and the final oxidation numbers for methanol.

What color is used to represent carbon in the methanol molecule?

• Blue

• Red

• White

• Black

According to the general rules, what is the oxidation number of hydrogen when bonded to nonmetals?

• -1

• +1

• +2

• 0

What is the typical oxidation number assigned to oxygen in compounds?

• 0

• -2

• -1

• +1

Why is carbon not directly listed in the general rules for oxidation numbers?

• It has a variable oxidation state.

• It is a metal.

• It is always zero.

• It is always positive.

How do we determine the oxidation number of carbon in methanol?

• By assuming it is zero.

• By using the known oxidation numbers of hydrogen and oxygen.

• By using a periodic table.

• By assuming it is the same as oxygen.

What should the sum of oxidation numbers in a neutral compound be?

• 0

• -1

• +2

• +1

What is the oxidation number of the central carbon in methanol?

• +2

• 0

• +4

• -2

What is the significance of the oxidation numbers adding up to zero in methanol?

• It proves the compound is basic.

• It shows the compound is acidic.

• It confirms the compound is neutral.

• It indicates the compound is ionic.

What was the main method used to find the unknown oxidation number in methanol?

• Using known oxidation numbers of other atoms.

• Using a calculator.

• Consulting a chemistry textbook.

• Guessing based on experience.