Chemical Formulas and Polyatomic Ions

The video tutorial explains how to write the formula for ammonium hydrogen phosphate, also known as diamonium hydrogen phosphate. It covers the identification of ammonium and hydrogen phosphate as polyatomic ions, their respective charges, and the process of balancing these charges to achieve a net charge of zero. The final formula for the compound is presented as (NH4)2HPO4.

What is the charge of the ammonium ion?

• 2-

• 1-

• 2+

• 1+

Which of the following is a polyatomic ion?

• Sodium

• Chlorine

• Oxygen

• Ammonium

What is the chemical formula for hydrogen phosphate?

• HPO4

• H3PO4

• PO4

• H2PO4

What is the charge of the hydrogen phosphate ion?

• 1-

• 2-

• 2+

• 1+

How many ammonium ions are needed to balance the charge of one hydrogen phosphate ion?

• One

• Two

• Three

• Four

What is the net charge of the compound when the charges are balanced?

• 2-

• 1-

• 0

• 1+

What is the final chemical formula for ammonium hydrogen phosphate?

• NH4(2)H2PO4

• NH4(2)HPO4

• NH4(2)PO4

• NH4HPO4