Ionic Compounds and Their Properties

The video tutorial explains how to determine the number of ions in potassium carbonate (K2CO3). It begins by identifying K2CO3 as an ionic compound composed of a metal (potassium) and non-metals (carbon and oxygen). The tutorial discusses the ionic charges of potassium (1+) and the carbonate ion (CO3 2-), and how these charges balance to give a net charge of zero. Finally, it calculates the total number of ions in K2CO3, which includes two potassium ions and one carbonate ion, resulting in three ions in total.

What type of compound is K2CO3?

• Molecular compound

• Metallic compound

• Ionic compound

• Covalent compound

Which elements in K2CO3 indicate it is an ionic compound?

• Hydrogen and oxygen

• Potassium, carbon, and oxygen

• Carbon and oxygen

• Potassium and hydrogen

What is the ionic charge of potassium in K2CO3?

• +1

• 0

• -1

• +2

What is the charge of the carbonate ion (CO3) in K2CO3?

• -1

• -2

• +2

• +1

How many potassium ions are present in one formula unit of K2CO3?

• Three

• Two

• Four

• One

What is the total number of ions in one formula unit of K2CO3?

• Five

• Four

• Three

• Two