Polyatomic Ions and K2HPO4 Concepts

This video tutorial explains how to name the compound K2HPO4. It begins by identifying the metal component, potassium, and then moves on to recognizing the polyatomic ion HPO4. The video demonstrates how to look up the ion on a table to confirm its name as hydrogen phosphate. Finally, it combines these elements to name the compound potassium hydrogen phosphate, noting that it is sometimes referred to as di-potassium phosphate.

What is the metal component in the compound K2HPO4?

• Sodium

• Magnesium

• Calcium

• Potassium

Which of the following is a polyatomic ion in K2HPO4?

• H2PO4

• HPO4

• PO4

• H3PO4

What is the charge of the hydrogen phosphate ion?

• 1-

• 2+

• 2-

• 1+

What is the name of the polyatomic ion HPO4?

• Dihydrogen phosphate

• Phosphate

• Hydrogen phosphate

• Phosphite

What is the full name of the compound K2HPO4?

• Potassium phosphate

• Potassium hydrogen phosphate

• Potassium dihydrogen phosphate

• Dipotassium phosphate

What is an alternative name sometimes used for K2HPO4?

• Tripotassium phosphate

• Monopotassium phosphate

• Dipotassium phosphate

• Tetrapotassium phosphate