Phosphate Ion and Potassium Compounds

The video tutorial explains how to determine the number of ions in potassium phosphate (K3PO4). It begins by identifying the components: potassium, a metal, and phosphate, a polyatomic ion. The tutorial discusses the ionic charges of these components, with potassium having a +1 charge and phosphate a -3 charge. It then calculates the total number of ions in the formula unit, resulting in three potassium ions and one phosphate ion, totaling four ions. The video concludes with a summary of the calculation process.

What type of ion is PO4 in the compound K3PO4?

• A polyatomic ion

• A monatomic ion

• A metal ion

• A diatomic ion

Which group on the periodic table does potassium belong to?

• Group 4

• Group 3

• Group 2

• Group 1

What is the ionic charge of a single potassium ion?

• 2+

• 1+

• 1-

• 3+

What is the overall charge of the phosphate ion (PO4) in K3PO4?

• 2-

• 1-

• 3-

• 4-

How many potassium ions are present in one formula unit of K3PO4?

• One

• Four

• Two

• Three

What is the total number of ions in one formula unit of K3PO4?

• Two

• Five

• Three

• Four