Oxidation Numbers in Acetaldehyde

The video tutorial explains how to determine oxidation numbers for acetaldehyde (CH3CHO). It covers two methods: calculating average oxidation numbers for the carbons and determining specific oxidation numbers for each carbon atom. The tutorial provides step-by-step calculations and explains the reasoning behind each step, ensuring the total oxidation numbers add up to zero. The video concludes with a summary of the oxidation numbers for acetaldehyde.

What is the chemical formula for acetaldehyde?

• CH4

• C2H5OH

• CH3CHO

• C2H6

Which element in acetaldehyde is almost always assigned an oxidation number of -2?

• Carbon

• Hydrogen

• Oxygen

• Nitrogen

What is the average oxidation number for the carbons in acetaldehyde?

• -1

• +1

• 0

• +2

Why do the carbons in acetaldehyde have different oxidation numbers?

• They have different atomic masses.

• They are bonded to different elements.

• They have different isotopes.

• They are in different phases.

What is the oxidation number of the carbon bonded to the oxygen in acetaldehyde?

• -3

• +3

• -1

• +1

What is the oxidation number of the carbon bonded to three hydrogens in acetaldehyde?

• +1

• -3

• -1

• +3

How do you calculate the sum of the oxidation numbers for the carbons in acetaldehyde?

• Add +1 and +1

• Add +3 and -1

• Add -1 and -1

• Add -3 and +1

What is the sum of the oxidation numbers for the carbons in acetaldehyde?

• +2

• -4

• -2

• 0

Which element in acetaldehyde is always assigned an oxidation number of +1?

• Oxygen

• Hydrogen

• Carbon

• Nitrogen

What is the overall oxidation number for acetaldehyde?

• +2

• -1

• +1

• 0