Spectator Ions and Net Ionic Equations

The video tutorial explains how to write a balanced net ionic equation for the reaction between sodium phosphate (Na3PO4) and hydrochloric acid (HCl). It begins by balancing the molecular equation, then assigns states to each substance, noting which compounds dissociate into ions. The tutorial distinguishes between strong and weak acids, emphasizing that weak acids do not fully dissociate. It then demonstrates how to form the complete ionic equation and identify spectator ions, which are removed to derive the net ionic equation. The tutorial concludes by ensuring the final equation is balanced in terms of both atoms and charge.

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

• Determine the solubility of compounds

• Write the complete ionic equation

• Balance the molecular equation

• Identify spectator ions

How many sodium atoms are present in the balanced molecular equation for Na3PO4 and HCl?

• Four

• Three

• Two

• One

What is the state of sodium ions in the reaction between Na3PO4 and HCl?

• Solid

• Liquid

• Gas

• Aqueous

Which type of acid is HCl in the context of this reaction?

• Base

• Strong acid

• Weak acid

• Non-electrolyte

Why is H3PO4 not split into ions in the complete ionic equation?

• It is a strong acid

• It is a weak acid

• It is insoluble

• It is a base

What is the purpose of forming the complete ionic equation?

• To identify spectator ions

• To determine solubility

• To calculate reaction rate

• To balance the molecular equation

What are spectator ions?

• Ions that are insoluble

• Ions that do not change during the reaction

• Ions that form a precipitate

• Ions that participate in the reaction

Which ions are considered spectator ions in this reaction?

• Sodium and phosphate ions

• Phosphate and hydrogen ions

• Chloride and hydrogen ions

• Sodium and chloride ions

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

• Negative

• Positive

• Variable

• Zero

What is verified in the final step of writing the net ionic equation?

• Solubility of compounds

• Presence of spectator ions

• Balance of charge and atoms

• Formation of precipitate