Oxidation States and Sulfate Ions

The video tutorial explains how to determine the oxidation number of lead in lead(IV) sulfate (PbSO4)2. It begins by discussing the neutrality of the compound and the need for oxidation numbers to sum to zero. The tutorial highlights the challenge of identifying oxidation states in transition metals and emphasizes the importance of considering the ions they bond with, such as the sulfate ion. The video provides a step-by-step calculation of oxidation numbers, focusing on the sulfate ion's charge and the resulting oxidation number for lead. The tutorial concludes with a summary of the calculation process and offers additional resources for understanding sulfur's oxidation number in sulfate ions.

What is the overall charge of the compound PbSO4₂?

• Depends on the environment

• Neutral

• Negative

• Positive

Why can't we determine the oxidation state of lead just by looking at it?

• Lead is a noble gas

• Lead is always in the same oxidation state

• Lead is a transition metal

• Lead is a non-metal

What is the ionic charge of the sulfate ion (SO4)?

• 2-

• 2+

• 1+

• 1-

How do the oxidation numbers of the elements in a sulfate ion add up?

• To a negative number

• To a positive number

• To zero

• To the charge of the ion

What is the oxidation number of lead in PbSO4₂?

• 5+

• 4+

• 3+

• 2+

If the sulfate ion has a charge of 2-, what is the total charge of two sulfate ions?

• 2+

• 4+

• 4-

• 2-

What must the oxidation number of lead be to balance the charge of two sulfate ions?

• 5+

• 3+

• 2+

• 4+

Where can you find additional help for determining the oxidation number of sulfur in sulfate?

• In the video description

• In the textbook

• In the periodic table

• In the appendix