Net Ionic Equations and Charge Balance

This video tutorial explains how to write a balanced net ionic equation for the reaction between calcium oxide and water. It covers balancing the molecular equation, assigning states to substances, splitting strong electrolytes into ions, and identifying complete and net ionic equations. The tutorial also emphasizes the importance of balancing charges and atoms to ensure the equation is correct.

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

• Identify spectator ions

• Balance the molecular equation

• Split strong electrolytes into ions

• Check the charge balance

What is the state of calcium oxide in the reaction with water?

• Gas

• Solid

• Liquid

• Aqueous

Which of the following is considered a strong electrolyte in the reaction?

• Water

• Calcium oxide

• Hydrogen gas

• Calcium hydroxide

What ions are formed when calcium hydroxide is dissolved in water?

• Ca+ and H+

• Ca+ and OH-

• Ca2+ and H+

• Ca2+ and OH-

What is the complete ionic equation for the reaction?

• CaO(s) + H2O(l) → Ca2+(aq) + 2OH-(aq)

• Ca(OH)2(aq) → Ca2+(aq) + 2OH-(aq)

• Ca2+(aq) + 2OH-(aq) → CaO(s) + H2O(l)

• CaO(s) + H2O(l) → Ca(OH)2(aq)

Why are there no spectator ions in this reaction?

• There are no ions in the reaction

• All ions are the same on each side

• All ions are unique on each side

• Spectator ions are not considered

What is the net charge of the balanced net ionic equation?

• 2+

• 0

• 2-

• 1+

How is the charge balance verified in the net ionic equation?

• By identifying spectator ions

• By counting the number of atoms

• By ensuring the total charge is zero

• By checking the states of substances

What is the significance of balancing atoms in the net ionic equation?

• To identify the limiting reactant

• To ensure the reaction is spontaneous

• To verify the reaction is complete

• To maintain the law of conservation of mass

What is the final step in verifying a net ionic equation?

• Checking the states of substances

• Ensuring charge and atoms are balanced

• Balancing the molecular equation

• Identifying spectator ions