Lead(II) Cyanide Compounds and Ions

The video tutorial explains how to write the chemical formula for lead(II) cyanide. It begins by identifying the element symbols and charges for lead and cyanide. Lead is represented as Pb with a 2+ charge, while cyanide is CN with a 1- charge. The tutorial emphasizes the importance of balancing these charges to achieve a neutral compound. By using two cyanide ions, the charges balance out, resulting in the formula Pb(CN)2. The video concludes with a summary of the process and the final formula.

What does the Roman numeral II indicate in the formula for lead(II) cyanide?

• The charge of the cyanide ion

• The number of lead atoms

• The charge of the lead ion

• The number of cyanide ions

Which of the following is true about the cyanide ion?

• It is a single element ion

• It is a polyatomic ion with a charge of 1-

• It has a charge of 2+

• It is found on the periodic table

What type of compound is formed between lead and cyanide?

• Metallic compound

• Covalent compound

• Ionic compound

• Molecular compound

Which of the following best describes lead in the context of lead(II) cyanide?

• A noble gas

• An alkali metal

• A transition metal

• A nonmetal

Why is it important to balance the charges in lead(II) cyanide?

• To ensure the compound is neutral

• To make the compound soluble

• To increase the compound's reactivity

• To ensure the compound is stable

How many cyanide ions are needed to balance the charge of one lead ion in lead(II) cyanide?

• One

• Three

• Four

• Two

What is the final chemical formula for lead(II) cyanide?

• Pb2(CN)

• Pb(CN)3

• Pb(CN)4

• Pb(CN)2