Ionic Compounds and Their Properties

This video tutorial explains how to write the chemical equation for the dissolution of potassium phosphate (K3PO4) in water (H2O). It covers the solubility rules, focusing on group one elements like potassium, which are soluble in water. The video also discusses the ionic charges of potassium and phosphate ions, and how K3PO4 dissociates into its ions when dissolved in water. The tutorial concludes with the complete equation for the dissolution process, emphasizing the aqueous state of the ions.

What type of compound is potassium phosphate?

• Ionic compound

• Covalent compound

• Metallic compound

• Molecular compound

According to solubility rules, why does potassium phosphate dissolve in water?

• Because it is a covalent compound

• Because it contains a Group 1 element

• Because it contains a transition metal

• Because it is a gas at room temperature

What is the ionic charge of potassium in potassium phosphate?

• 2+

• 1+

• 3+

• 0

What is the ionic charge of the phosphate ion?

• 2-

• 1-

• 4-

• 3-

How many potassium ions are present when K3PO4 dissolves in water?

• One

• Two

• Four

• Three

What does the subscript '3' in K3PO4 indicate?

• Three water molecules

• Three oxygen atoms

• Three potassium ions

• Three phosphate ions

In the chemical equation, what does 'aq' signify?

• Liquid state

• Solid state

• Aqueous state

• Gaseous state

Where is it acceptable to place water in the chemical equation for this reaction?

• Above the arrow or on the reactant side

• Only on the product side

• Only on the reactant side

• Above the arrow or on the product side

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

• Because it is a gas

• Because it is a solid

• Because it is not involved in the reaction

• Because it is already implied by 'aq'

What is the role of water in the dissolution of potassium phosphate?

• It acts as a reactant

• It acts as a catalyst

• It acts as a product

• It acts as a solvent