Ammonium Cyanide and Polyatomic Ions

The video tutorial explains how to write the formula for ammonium cyanide by understanding the charges of the ammonium ion (NH4+) and the cyanide ion (CN-). It highlights the need to balance these charges to achieve a neutral compound, resulting in the formula NH4CN. The tutorial also emphasizes the ionic nature of the compound despite being composed of non-metals.

What is the chemical formula for the ammonium ion?

• NH4-

• NH2-

• NH4+

• NH3

Which of the following is a polyatomic ion?

• NH4+

• Cl-

• Na+

• O2-

What is the charge of the cyanide ion?

• 1-

• 2-

• 2+

• 1+

How do the charges of ammonium and cyanide ions combine in ammonium cyanide?

• They both have negative charges.

• They cancel each other out to form a neutral compound.

• They both have positive charges.

• They form a compound with a net positive charge.

What is the significance of the charges in forming ammonium cyanide?

• They influence the solubility in water.

• They affect the melting point.

• They ensure the compound is neutral.

• They determine the color of the compound.

What type of compound is ammonium cyanide?

• Covalent compound

• Ionic compound

• Metallic compound

• Molecular compound

Which elements are present in ammonium cyanide?

• Nitrogen and hydrogen only

• Carbon and nitrogen only

• Nitrogen, hydrogen, and carbon

• Hydrogen and carbon only