Oxidation Numbers and Carbonate Ion

The video tutorial explains how to determine oxidation numbers for elements in CuCO3. It starts by discussing the rules for oxidation numbers in neutral compounds and ions. The tutorial highlights the challenges with transition metals like copper and explains the carbonate ion's role. It then demonstrates setting up and solving equations to find individual oxidation numbers, concluding with a summary of the oxidation numbers for each element in copper(II) carbonate.

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

• It equals the number of atoms in the compound.

• It equals zero.

• It equals the atomic number of the first element.

• It equals the charge of the most electronegative element.

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

• 1+

• 1-

• 2+

• 2-

Why is determining the oxidation number of copper challenging?

• Copper is a transition metal with variable oxidation states.

• Copper has a fixed oxidation state.

• Copper is a non-metal.

• Copper is always in the +1 oxidation state.

What is the typical oxidation number of oxygen in compounds?

• +2

• -2

• -1

• 0

How many oxygen atoms are present in the carbonate ion?

• 1

• 4

• 3

• 2

What equation is used to find the oxidation number of carbon in CO3?

• x + 3 = 0

• x - 2 = 6

• x + 6 = 2

• x - 6 = -2

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

• +6

• +2

• +3

• +4

What is the oxidation number of copper in CuCO3?

• +2

• +4

• +1

• +3

What is the overall charge of the CuCO3 compound?

• 0

• +1

• +2

• -1

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

• +2

• -2

• -1

• 0