Oxidation Numbers and Carbonate Ions

The video tutorial explains how to find oxidation numbers for elements in PbCO3, focusing on the carbonate ion's charge and the oxidation numbers of lead and carbon. It uses rules from the periodic table and basic arithmetic to determine these values, concluding with a recap of the process.

What is the primary goal when finding oxidation numbers in PbCO3?

• To calculate the number of atoms

• To find the oxidation numbers of each element

• To identify the charge of each element

• To determine the molecular weight

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

• 1+

• 2-

• 0

• 3-

Why does lead (Pb) have an oxidation number of +2 in PbCO3?

• Because it is a metal

• Because it balances the charge of the carbonate ion

• Because it forms a covalent bond

• Because it is in Group 2 of the periodic table

What is the typical oxidation number of oxygen in compounds?

• +2

• -2

• 0

• -1

How many oxygen atoms are present in the carbonate ion?

• 4

• 3

• 2

• 1

What equation is set up to find the oxidation number of carbon in PbCO3?

• 2 + x - 6 = 0

• x + 2 = 6

• x - 2 = 6

• 2x - 6 = 0

What is the oxidation number of carbon in PbCO3?

• +3

• +2

• +4

• +5

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

• -1

• 1

• 2

• 0

What rule is used to determine the oxidation number of oxygen?

• Oxygen is always +2

• Oxygen is always -2 with few exceptions

• Oxygen is always -1

• Oxygen is always neutral