Ionic Compounds and Their Properties

The video tutorial explains how to determine the number of ions in a formula unit of potassium chloride (KCl). It describes KCl as an ionic compound formed by a metal (potassium) and a non-metal (chlorine). The video discusses the ionic charges of potassium and chloride, which result in a net charge of zero, forming the compound. When KCl is dissolved in water, it breaks into potassium ions (K+) and chloride ions (Cl-), both in aqueous form. The tutorial concludes by confirming that there are two ions in potassium chloride.

What type of compound is formed when a metal and a non-metal combine?

• Covalent compound

• Ionic compound

• Metallic compound

• Molecular compound

Which group in the periodic table does potassium belong to, and what is its typical ionic charge?

• Group 1, 1+

• Group 17, 1-

• Group 18, 0

• Group 2, 2+

What is the ionic charge of the chloride ion?

• 1+

• 2+

• 1-

• 2-

What happens to potassium chloride when it is dissolved in water?

• It forms a precipitate

• It remains unchanged

• It dissociates into ions

• It evaporates

How many ions are present in one formula unit of potassium chloride?

• Three

• Two

• Four

• One