Net Ionic Equations and Spectator Ions

The video tutorial explains how to write a balanced net ionic equation for the reaction between chromium-3 sulfate and ammonium carbonate. It begins by balancing the molecular equation, then determines the states of the substances involved. The tutorial proceeds to write the complete ionic equation by splitting strong electrolytes into ions. Finally, it derives the net ionic equation by removing spectator ions and ensuring charge balance, highlighting the importance of treating polyatomic ions as single units for easier balancing.

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

• Split strong electrolytes into ions

• Determine the solubility of compounds

• Balance the molecular equation

• Identify spectator ions

Why is it important to know the solubility of compounds in a reaction?

• To identify the spectator ions

• To determine the color of the solution

• To know which compounds will dissolve and which will form a precipitate

• To calculate the pH of the solution

Which of the following is generally insoluble except with group 1 elements?

• Chlorides

• Nitrates

• Carbonates

• Sulfates

What is the charge of the sulfate ion?

• 1-

• 2+

• 2-

• 3-

When writing the complete ionic equation, what should be done with strong electrolytes?

• Leave them as whole compounds

• Split them into their constituent ions

• Convert them into gases

• Ignore them

What are spectator ions?

• Ions that change color

• Ions that participate in the reaction

• Ions that form a precipitate

• Ions that do not change during the reaction

How do you identify spectator ions in a complete ionic equation?

• They appear unchanged on both sides of the equation

• They are only on the product side

• They are only on the reactant side

• They are the ions that form a solid

What is the net charge of a balanced net ionic equation?

• Depends on the reaction

• Zero

• Negative

• Positive

Why is it important to ensure charge conservation in a net ionic equation?

• To balance the number of atoms

• To ensure the equation is neutral

• To predict the color of the solution

• To determine the reaction rate

What is the final step in deriving a balanced net ionic equation?

• Determining solubility

• Identifying spectator ions

• Balancing the molecular equation

• Ensuring charge and atom balance