Ionic Compounds and Carbonate Ions

The video tutorial explains how to write the equation for potassium carbonate (K2CO3) reacting with water (H2O). It covers the identification of ionic compounds, the charges of potassium and carbonate ions, and the dissociation process in water. The tutorial concludes with writing the complete equation, indicating the ions are dissolved in water.

What type of compound is formed when potassium, a metal, combines with carbonate, a group of nonmetals?

• Ionic compound

• Molecular compound

• Covalent compound

• Metallic compound

What is the charge of a potassium ion when it is part of an ionic compound?

• 0

• +1

• -1

• +2

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

• +2

• +1

• -2

• -1

What happens to solid potassium carbonate when it is placed in water?

• It remains unchanged

• It evaporates

• It forms a precipitate

• It dissociates into ions

How many potassium ions are produced when potassium carbonate dissociates in water?

• Four

• Three

• Two

• One

What does the notation 'aq' signify in a chemical equation?

• The substance is a solid

• The substance is a gas

• The substance is a liquid

• The substance is dissolved in water

Why is it unnecessary to write H2O on the product side of the equation?

• Because it is a solid

• Because the ions are dissolved in water

• Because it is a gas

• Because it is a reactant

What is the final equation for the reaction between potassium carbonate and water?

• K2CO3 + H2O → K2 + CO3 + H2

• K2CO3 + H2O → KOH + CO2

• K2CO3 + H2O → 2K+ + CO3 2-

• K2CO3 + H2O → K2CO3 + H2O