Net Ionic Equations and Spectator Ions

The video tutorial explains how to write a balanced net ionic equation for the reaction between calcium oxide (CaO) and nitric acid (HNO3). It begins by balancing the molecular equation, then assigns states to each substance. The tutorial proceeds to split strong electrolytes into ions for the complete ionic equation, while solids and liquids remain intact. Spectator ions are identified and crossed out to derive the net ionic equation. The tutorial concludes by ensuring that both atoms and charges are balanced in the final net ionic equation.

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

• Identify spectator ions

• Balance the molecular equation

• Split strong electrolytes into ions

• Write the states of substances

What is the state of calcium oxide in the reaction?

• Aqueous

• Liquid

• Solid

• Gas

Why does nitric acid dissociate completely in water?

• It is a solid

• It is a gas

• It is a strong acid

• It is a weak acid

Which ions are present in the reactants of the complete ionic equation?

• Calcium ions and water

• Hydrogen ions and nitrate ions

• Calcium ions and nitrate ions

• Hydrogen ions and water

What is the charge of the calcium ion in the products?

• 1-

• 2+

• 2-

• 1+

What are spectator ions?

• Ions that participate in the reaction

• Ions that do not change during the reaction

• Ions that form a precipitate

• Ions that are gases

Which ions are crossed out as spectator ions in this reaction?

• Water molecules

• Calcium ions

• Hydrogen ions

• Nitrate ions

What ensures that the net ionic equation is balanced?

• Equal number of electrons on both sides

• Equal number of atoms on both sides

• Equal number of molecules on both sides

• Equal number of ions on both sides

What is the charge balance in the net ionic equation?

• Neutral on both sides

• 1- on both sides

• 2+ on both sides

• 1+ on both sides

Who is the presenter of the video?

• Dr. C

• Dr. D

• Dr. B

• Dr. A