Ionic Compounds and Lithium Ions

The video tutorial explains how to write the chemical formula for lithium phosphate. It begins by identifying lithium and phosphate, noting that phosphate is a polyatomic ion with a 3- charge. The tutorial then discusses the need to balance the charges in ionic compounds, highlighting that lithium has a 1+ charge. By using three lithium ions, the charges balance to zero, resulting in the formula Li3PO4. The video concludes with a summary by Dr. B.

What is the element symbol for lithium?

• Lt

• L

• Li

• Lm

Which of the following is a polyatomic ion?

• Hydrogen

• Phosphate

• Lithium

• Oxygen

What is the charge of the phosphate ion?

• 4-

• 2-

• 1-

• 3-

Why must the net charge of an ionic compound be zero?

• To ensure stability

• To make it a polyatomic ion

• To satisfy the periodic table

• To balance the equation

What is the ionic charge of lithium?

• 1+

• 4+

• 2+

• 3+

How many lithium ions are needed to balance the charge of one phosphate ion?

• 4

• 1

• 2

• 3