Net Ionic Equations and Spectator Ions

The video tutorial explains how to write a balanced net ionic equation for the reaction between aluminum and hydrobromic acid. It begins with balancing the molecular equation, assigning states to each substance, and then splitting strong electrolytes into ions to form the complete ionic equation. Spectator ions are identified and removed to derive the net ionic equation. The tutorial concludes with verifying the balance of charges and atoms in the final equation.

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

• Identify spectator ions

• Balance the molecular equation

• Split strong electrolytes into ions

• Assign states to each substance

Why is hydrobromic acid considered a strong acid?

• It is insoluble in water

• It is a weak electrolyte

• It does not dissociate into ions

• It completely dissociates into ions

What state is assigned to aluminum in the reaction with hydrobromic acid?

• Aqueous

• Solid

• Liquid

• Gas

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

• 1+

• 2+

• 3+

• 4+

How many bromide ions are present in the reactants of the complete ionic equation?

• Four

• Six

• Eight

• Two

What is the purpose of identifying spectator ions in a net ionic equation?

• To calculate the total charge

• To balance the equation

• To simplify the equation by removing ions that do not participate in the reaction

• To determine the states of substances

Which ions are considered spectator ions in the reaction between aluminum and hydrobromic acid?

• Hydroxide ions

• Bromide ions

• Aluminum ions

• Hydrogen ions

What ensures that the net ionic equation is balanced?

• Equal number of atoms on both sides

• Equal number of molecules on both sides

• Equal charges on both sides

• Both equal number of atoms and charges on both sides

What is the final step in confirming the balanced net ionic equation?

• Checking the solubility of products

• Ensuring the charges and atoms are balanced

• Calculating the reaction yield

• Identifying the limiting reactant

What is the charge on the product side of the balanced net ionic equation for Al + HBr?

• 3+

• 6+

• 9+

• 12+