Calcium and Phosphite Ions

The video tutorial explains how to name the ionic compound Ca3(PO3)2. It begins by identifying the components: calcium, a metal, and the polyatomic ion phosphite. The naming process involves writing the metal name first, followed by the polyatomic ion. The tutorial also covers the charge balancing between calcium ions and phosphite ions, ensuring a net charge of zero. The compound is named calcium phosphite, and the video concludes with a summary of the naming process.

What is the first step in naming an ionic compound?

• Identify the polyatomic ion

• Write the name of the metal

• Determine the charge of the compound

• Count the number of atoms

Which of the following is a polyatomic ion in the compound Ca3(PO3)2?

• Phosphate

• Phosphite

• Calcium

• Sulfate

How can you identify the phosphite ion?

• By memorizing it or using a table of ions

• By its taste

• By its color

• By its smell

What is the charge of the calcium ion in Ca3(PO3)2?

• 3+

• 2+

• 1+

• 4+

What is the charge of the phosphite ion in Ca3(PO3)2?

• 1-

• 2-

• 3-

• 4-

Why do we need three calcium atoms in Ca3(PO3)2?

• To increase the volume of the compound

• To make the compound heavier

• To change the color of the compound

• To balance the charge of the compound