Ionic Compounds and Aqueous Solutions

The video tutorial explains how to write the chemical equation for the reaction between potassium iodide (KI) and water (H2O). It begins by introducing the components of the reaction and explaining the nature of ionic compounds, focusing on the charges of potassium and iodine. The process of dissociation of KI in water is described, leading to the formation of potassium cations and iodide anions. The tutorial concludes with the final chemical equation and a brief summary.

What type of compound is formed when potassium and iodine combine?

• Metallic compound

• Molecular compound

• Covalent compound

• Ionic compound

What is the ionic charge of potassium in the reaction?

• -1

• 0

• +2

• +1

Which group on the periodic table does iodine belong to?

• Group 18

• Group 2

• Group 17

• Group 1

What happens to solid KI when it is added to water?

• It dissolves into ions

• It remains unchanged

• It reacts violently

• It forms a precipitate

What are the ions formed when KI dissolves in water?

• K- and I+

• K2- and I2+

• K2+ and I2-

• K+ and I-

What does 'aq' signify in the chemical equation?

• Gaseous state

• Solid state

• Aqueous or dissolved in water

• Liquid state

Why is water not written on the product side of the equation?

• Because it is not involved in the reaction

• Because the ions are dissolved in water

• Because it forms a new compound

• Because it evaporates