Oxidation States in Carbonate Compounds

The video tutorial explains how to determine the oxidation numbers for each element in MnCO3, manganese(II) carbonate. It begins by identifying MnCO3 as a neutral compound, meaning the oxidation numbers must sum to zero. The carbonate ion (CO3) is recognized as having a -2 charge, which is crucial for calculating the oxidation states. The tutorial demonstrates that manganese has an oxidation state of +2, while carbon is +4, using equations to balance the charges. The video concludes with a summary of these findings.

What is the overall charge of MnCO3?

• Negative

• Positive

• Variable

• Neutral

What is the charge of the carbonate ion (CO3) in MnCO3?

• 2-

• 1-

• 0

• 3-

How do the oxidation numbers in a neutral compound like MnCO3 add up?

• To the number of atoms

• To zero

• To the charge of the compound

• To the atomic mass

What is the oxidation state of manganese in MnCO3?

• +1

• +2

• +3

• +4

Which element's oxidation state is known to be -2 in MnCO3?

• Oxygen

• Hydrogen

• Manganese

• Carbon

What is the oxidation state of carbon in the carbonate ion?

• +4

• +5

• +2

• +3

How many oxygen atoms are present in the carbonate ion?

• 3

• 2

• 4

• 1

What is the sum of oxidation numbers in the carbonate ion?

• +4

• 0

• -2

• +2

What is the oxidation state of carbon in MnCO3?

• +2

• +5

• +3

• +4