Net Ionic Equations and Spectator Ions

The video tutorial explains how to write a balanced net ionic equation for the reaction between sodium hydroxide and aluminum nitrate. It begins by balancing the molecular equation, then determines the states of each substance involved. The tutorial proceeds to write the complete ionic equation by splitting strong electrolytes into ions. Spectator ions are identified and removed to derive the net ionic equation. The video concludes by ensuring charge and mass balance in the final equation.

What is the first step in balancing net ionic equations?

• Determine the solubility of compounds

• Identify spectator ions

• Write the net ionic equation

• Balance the molecular equation

Why is sodium hydroxide considered aqueous?

• It is a weak base

• It is insoluble in water

• It forms a precipitate

• It is a strong base and dissociates in water

Which of the following compounds is generally insoluble?

• Sodium nitrate

• Potassium hydroxide

• Aluminum hydroxide

• Sodium hydroxide

What is the charge of the aluminum ion in the complete ionic equation?

• 3+

• 4+

• 2+

• 1+

What do we call ions that do not participate in the reaction?

• Reactive ions

• Spectator ions

• Active ions

• Neutral ions

Which ions are removed to form the net ionic equation?

• Only negative ions

• Spectator ions

• Only positive ions

• All ions

What is the net ionic equation for the reaction between sodium hydroxide and aluminum nitrate?

• 3Na+ + 3OH- + Al3+ → Al(OH)3

• NaOH + Al(NO3)3 → NaNO3 + Al(OH)3

• 3Na+ + 3NO3- + Al3+ → Al(OH)3

• 3OH- + Al3+ → Al(OH)3

How is charge conservation ensured in the net ionic equation?

• By ensuring equal positive and negative charges

• By balancing the number of atoms

• By adding more reactants

• By removing all spectator ions

What is the significance of mass conservation in chemical equations?

• It ensures the reaction is spontaneous

• It confirms the number of atoms is the same on both sides

• It determines the solubility of compounds

• It balances the charges

Why might the positive ion be written first in a net ionic equation?

• It looks aesthetically pleasing

• It is more reactive

• It has a higher charge

• It is a convention in chemistry