Ionic Compounds and Polyatomic Ions

The video tutorial explains how to write the formula for lead(II) sulfate. It begins by identifying lead and sulfate, noting that sulfate is a polyatomic ion with a 2- charge. The tutorial discusses the formation of ionic compounds, emphasizing the need to balance charges to achieve a neutral molecule. Lead(II) sulfate is shown to have a net charge of zero, resulting in the formula PbSO4.

What is the chemical symbol for lead?

• Le

• Ld

• Pd

• Pb

Which of the following is a polyatomic ion?

• Lead

• Sulfate

• Oxygen

• Hydrogen

What is the ionic charge of sulfate?

• 2-

• 1-

• 2+

• 1+

Why is it important to balance charges in ionic compounds?

• To make them colorful

• To ensure they are neutral

• To increase their weight

• To make them reactive

What is the charge of lead in lead(II) sulfate?

• 3+

• 4+

• 2+

• 1+

What is the net charge of a neutral ionic compound?

• 0

• 2+

• 1+

• 1-

What is the correct formula for lead(II) sulfate?

• PbSO3

• Pb2SO4

• PbSO4

• Pb(SO4)2