Ammonium Ion and Phosphide Concepts

The video tutorial explains how to name the compound NH43P, known as ammonium phosphide. It begins by identifying NH4 as a polyatomic ion called the ammonium ion, which carries a one-plus charge. The tutorial emphasizes the importance of memorizing this ion due to its frequent appearance in general chemistry. The process of naming involves recognizing the ammonium ion and the phosphide ion, which has a three-minus charge. The tutorial also covers the concept of ionic compounds, highlighting the need for charge balance, which requires three ammonium ions to balance the charge of one phosphide ion.

What is the charge of the ammonium ion?

• 3-

• 1+

• 1-

• 2+

What is the name of the polyatomic ion NH4?

• Sulfate

• Nitrate

• Ammonium

• Phosphate

Why is it important to memorize the ammonium ion?

• It is a metal ion.

• It has a unique color.

• It is rarely used in chemistry.

• It is the most common positive ion in general chemistry.

How do you modify the name of phosphorus when naming NH4_3P?

• Add 'ite' to the end

• Add 'ium' to the end

• Add 'ide' to the end

• Add 'ate' to the end

What type of compound is ammonium phosphide?

• Metallic

• Covalent

• Molecular

• Ionic

What is the charge of the phosphide ion?

• 3-

• 2-

• 1+

• 2+

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

• Four

• Three

• Two

• One

What is the formula for ammonium phosphide?

• NH4_3P

• NH4_4P

• NH4P

• NH4_2P