Ionic Compounds and Their Properties

The video tutorial explains how to name the compound PbS2. It begins by identifying lead as a post-transition metal with variable charges and sulfur as a non-metal. The tutorial follows the rules for naming ionic compounds, starting with the metal (lead) and then the non-metal (sulfur), replacing the ending with 'ide' to form 'lead sulfide'. The charge of lead is determined by the charge of sulfur, which is 2-. With two sulfur atoms, the total negative charge is 4-, requiring lead to have a 4+ charge to balance it. This is indicated by using a Roman numeral IV in the name, resulting in 'lead(IV) sulfide'.

What type of metal is lead considered in the context of PbS2?

• Post-transition metal

• Alkaline earth metal

• Transition metal

• Alkali metal

In naming ionic compounds, what is the term used for the positive ion?

• Polyatomic ion

• Cation

• Neutral ion

• Anion

What suffix is used to replace the ending of the nonmetal in ionic compounds?

• -ide

• -ate

• -ous

• -ite

What is the charge of sulfur in PbS2?

• 1-

• 2-

• 3-

• 4-

How many sulfur atoms are present in PbS2?

• One

• Two

• Three

• Four

What is the charge of lead in PbS2 to balance the charges?

• 2+

• 3+

• 4+

• 5+

What would be the name of PbS if it had only one sulfur atom?

• Lead(IV) sulfide

• Lead(III) sulfide

• Lead(II) sulfide

• Lead(I) sulfide