Sodium Ions and Phosphate Compounds

The video tutorial explains how to write the chemical formula for sodium phosphate (Na3PO4). It begins by identifying the compound as ionic, consisting of sodium (Na) and phosphate (PO4). Sodium, a metal, has a +1 charge, and with three sodium atoms, the total positive charge is +3. The polyatomic ion PO4 has a -3 charge, balancing the compound. The tutorial uses the periodic table and common ion table to identify these charges and names the compound sodium phosphate.

What is the charge of a single sodium (Na) ion?

• -1

• +2

• 0

• +1

How many sodium ions are present in Na3PO4?

• 3

• 4

• 2

• 1

What is the total charge of the PO4 ion?

• -1

• +1

• -3

• +3

What is the name of the PO4 ion?

• Sulfate

• Phosphate

• Nitrate

• Carbonate

What is the correct name for the compound Na3PO4?

• Sodium Carbonate

• Sodium Phosphate

• Sodium Nitrate

• Sodium Sulfate