Naming and Properties of Na2HPO4

The video tutorial explains how to name the compound Na2HPO4. It begins by identifying the metal component, sodium, from the periodic table. The video then focuses on recognizing HPO4 as a polyatomic ion, specifically the hydrogen phosphate ion. The compound is named sodium hydrogen phosphate, with a note on its occasional alternative name, disodium phosphate. The tutorial concludes with a brief summary of the naming process.

What is the first step in naming the compound Na2HPO4?

• Write the name of the metal

• Determine the ionic charge

• Check the molecular weight

• Identify the polyatomic ion

What is the name of the metal in Na2HPO4?

• Potassium

• Sodium

• Calcium

• Magnesium

What is the ionic charge of the hydrogen phosphate ion (HPO4)?

• 1-

• 2+

• 2-

• 3-

What is the correct name for the compound Na2HPO4?

• Sodium hydrogen phosphate

• Sodium dihydrogen phosphate

• Sodium phosphate

• Disodium phosphate

Which of the following is an alternative name sometimes used for sodium hydrogen phosphate?

• Monosodium phosphate

• Disodium phosphate

• Trisodium phosphate

• Tetrasodium phosphate