Net Ionic Equations and Spectator Ions

This video tutorial guides viewers through the process of writing a balanced net ionic equation for the reaction between aluminum nitrate and ammonium hydroxide. It covers balancing the molecular equation, determining the states of substances using solubility rules, writing the complete ionic equation, and identifying spectator ions to derive the net ionic equation. The tutorial emphasizes the importance of charge conservation and atom balance in the final equation.

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

• Write the complete ionic equation

• Determine the solubility of compounds

• Balance the molecular equation

• Identify spectator ions

What is the balanced molecular equation for the reaction between aluminum nitrate and ammonium hydroxide?

• Al(NO3)3 + 3NH4OH → Al(OH)3 + 3NH4NO3

• Al(NO3)3 + NH4OH → Al(OH)3 + NH4NO3

• Al(NO3)3 + 2NH4OH → Al(OH)3 + 2NH4NO3

• Al(NO3)3 + 4NH4OH → Al(OH)3 + 4NH4NO3

Which of the following ions is always soluble?

• Nitrate ion

• Phosphate ion

• Carbonate ion

• Sulfate ion

Which compound is an exception to the general insolubility of hydroxides?

• Calcium hydroxide

• Magnesium hydroxide

• Ammonium hydroxide

• Iron(III) hydroxide

What happens when aluminum nitrate reacts with ammonium hydroxide?

• The solution becomes basic

• A gas is released

• A precipitate forms

• The solution becomes acidic

What is the state of aluminum hydroxide when it forms in the reaction?

• Gas

• Liquid

• Aqueous

• Solid

What is the role of spectator ions in a chemical reaction?

• They remain unchanged and do not participate

• They participate in the reaction

• They increase the reaction rate

• They change the color of the solution

Which ions are considered spectator ions in the reaction?

• Hydrogen ions

• Nitrate ions

• Hydroxide ions

• Aluminum ions

How is charge conservation ensured in a net ionic equation?

• By adding more reactants

• By removing spectator ions

• By ensuring the total charge is the same on both sides

• By balancing the number of atoms

What is the net charge of the compounds in the net ionic equation?

• Positive

• Negative

• Zero

• Variable