Sodium Phosphate Compounds and Properties

The video tutorial explains how to write the chemical formula for sodium phosphate, an ionic compound. It begins by identifying sodium as a metal with a +1 charge and phosphate as a polyatomic ion with a -3 charge. The tutorial demonstrates balancing these charges by using subscripts, resulting in the formula Na3PO4. The video concludes with a reference to additional resources for further practice.

What type of compound is sodium phosphate?

• Metallic compound

• Molecular compound

• Ionic compound

• Covalent compound

What is the charge of sodium in sodium phosphate?

• +2

• +1

• -1

• 0

Which group in the periodic table does sodium belong to?

• Group 1

• Group 3

• Group 4

• Group 2

What is the chemical formula for the phosphate ion?

• PO4 2-

• PO3 3-

• PO4 3-

• PO3 2-

Why do we need to balance the charges when writing the formula for sodium phosphate?

• To ensure the compound is stable

• To make the compound more reactive

• To change the compound's color

• To increase the compound's mass

How many sodium atoms are needed to balance the charge of one phosphate ion?

• Three

• One

• Two

• Four

What is the correct formula for sodium phosphate?

• NaPO4

• Na3PO4

• Na4PO4

• Na2PO4