Net Ionic Equations and Spectator Ions

The video tutorial explains how to write the net ionic equation for the reaction between potassium carbonate (K2CO3) and calcium chloride (CaCl2). It begins by balancing the molecular equation, then discusses the solubility of the compounds involved, and assigns states to each. The tutorial proceeds to split the compounds into ions to form the complete ionic equation, and finally derives the net ionic equation by removing spectator ions. The video concludes with a summary of the process and the final net ionic equation.

What is the first step in writing a net ionic equation for a reaction?

• Identify spectator ions

• Balance the molecular equation

• Write the complete ionic equation

• Determine the solubility of compounds

Which of the following is generally insoluble in water?

• Potassium carbonate

• Calcium chloride

• Calcium carbonate

• Sodium chloride

What does 'aq' signify when writing chemical equations?

• The compound is a liquid

• The compound is a solid

• The compound is a gas

• The compound is aqueous

What is the charge of the carbonate ion?

• 1+

• 2+

• 3+

• 2-

In the complete ionic equation, what does the subscript '2' indicate for K+?

• The charge of potassium is 2+

• Potassium is a diatomic molecule

• Potassium is insoluble

• There are two potassium ions

What are spectator ions?

• Ions that are insoluble

• Ions that participate in the reaction

• Ions that do not change during the reaction

• Ions that form a precipitate

Which ions are removed to form the net ionic equation?

• Spectator ions

• Ions that are aqueous

• Only the ions that form a solid

• All ions

What is the net ionic equation for the reaction between K2CO3 and CaCl2?

• 2K+ + 2Cl- → 2KCl

• Ca2+ + 2Cl- → CaCl2

• Ca2+ + CO3 2- → CaCO3

• K2CO3 + CaCl2 → 2KCl + CaCO3

Why is calcium often written first in the net ionic equation?

• It is a metal

• It is more reactive

• It is a spectator ion

• It looks nicer

What is the significance of a precipitate in a chemical reaction?

• It suggests the reaction is reversible

• It means the reaction is endothermic

• It shows a solid is formed

• It indicates a gas is formed