Polyatomic Ions and Their Properties

The video tutorial explains how to name the compound NH4(3)PO4 by identifying its polyatomic ions, ammonium (NH4) and phosphate (PO4). It discusses the ionic charges of these ions, with ammonium having a +1 charge and phosphate a -3 charge. The tutorial demonstrates how to balance these charges to form ammonium phosphate, emphasizing the importance of recognizing polyatomic ions and their charges in naming compounds.

What is the first step in naming the compound NH4(3)PO4?

• Identify the metal ion

• Determine the molecular geometry

• Recognize the polyatomic ions

• Calculate the molar mass

What is the charge of the ammonium ion (NH4)?

• 2+

• 1+

• 3-

• 0

Which of the following is true about the phosphate ion (PO4)?

• It is a monatomic ion

• It has a 2+ charge

• It is a cation

• It has a 3- charge

How many ammonium ions are needed to balance one phosphate ion in NH4(3)PO4?

• Three

• Two

• Four

• One

What type of bond holds the ammonium and phosphate ions together in NH4(3)PO4?

• Covalent bond

• Metallic bond

• Hydrogen bond

• Ionic bond

What is the correct name for the compound NH4(3)PO4?

• Ammonium phosphide

• Ammonium phosphorate

• Ammonium phosphate

• Ammonium phosphite

Why do we need three ammonium ions for one phosphate ion?

• To match the molecular weight

• To form a covalent bond

• To achieve a neutral pH

• To balance the charges

What is the significance of recognizing polyatomic ions in a compound?

• It helps in determining the color of the compound

• It is essential for naming the compound correctly

• It indicates the compound's solubility

• It shows the compound's reactivity