Calcium and Calcium Phosphate Concepts

The video tutorial explains how to determine the number of ions in calcium phosphate (Ca3(PO4)2). It begins by identifying calcium phosphate as an ionic compound, highlighting the need for charge balance. Calcium, a metal, has a 2+ charge, while the phosphate ion is 3-. The tutorial demonstrates the balancing of these charges to achieve a neutral compound. It concludes by counting the ions: three calcium ions and two phosphate ions, totaling five ions per formula unit.

What type of compound is calcium phosphate?

• Molecular compound

• Covalent compound

• Ionic compound

• Metallic compound

Which group on the periodic table does calcium belong to?

• Group 1

• Group 2

• Group 4

• Group 3

What is the charge of a phosphate ion?

• 2-

• 3+

• 2+

• 3-

How many calcium ions are present in a formula unit of calcium phosphate?

• Four

• One

• Two

• Three

What is the total number of ions in a formula unit of calcium phosphate?

• Four

• Three

• Six

• Five