Net Ionic Equations and Charge Balance

The video tutorial explains how to write a balanced net ionic equation for the reaction between chromium-3 nitrate and sodium hydroxide. It begins with balancing the molecular equation, identifying the states of substances, and then splitting strong electrolytes into ions for the complete ionic equation. Spectator ions are crossed out to derive the net ionic equation, ensuring that both charge and atom balance are maintained. The tutorial concludes with a review of the balanced net ionic equation, emphasizing the conservation of charge and atom balance.

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

• Balance the molecular equation

• Determine the states of substances

• Identify spectator ions

• Split strong electrolytes into ions

How do you balance the number of nitrate ions in the molecular equation?

• Add water molecules

• Remove chromium ions

• Add a coefficient in front of sodium nitrate

• Add more sodium hydroxide

What is the state of sodium hydroxide in the reaction?

• Solid

• Liquid

• Gas

• Aqueous

Which of the following is a precipitate in the reaction?

• Sodium nitrate

• Chromium-3 hydroxide

• Nitrate ions

• Sodium ions

What is the purpose of splitting strong electrolytes into ions?

• To identify the precipitate

• To balance the charges

• To write the complete ionic equation

• To determine the reaction rate

What are spectator ions?

• Ions that are gases

• Ions that participate in the reaction

• Ions that do not change during the reaction

• Ions that form a precipitate

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

• Identifying spectator ions

• Ensuring charge and atom balance

• Determining the states of substances

• Balancing the molecular equation

Why is it important to ensure charge balance in the net ionic equation?

• To make the equation more complex

• To satisfy the law of conservation of charge

• To ensure the reaction is feasible

• To satisfy the law of conservation of mass

What does a neutral compound in the net ionic equation indicate?

• The reaction is exothermic

• The charges are balanced

• The reaction is incomplete

• The reaction is endothermic

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

• To ensure the reaction is reversible

• To satisfy the law of conservation of mass

• To decrease the reaction rate

• To increase the reaction rate