Net Ionic Equations and Spectator Ions

The video tutorial explains how to write a balanced net ionic equation for the reaction between chromium-3 nitrate and lithium carbonate. It begins with balancing the molecular equation, identifying the states of substances, and forming the complete ionic equation. Spectator ions are then identified and removed to form the net ionic equation. The tutorial concludes by ensuring that both charge and atoms are balanced in the final equation.

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

• Identify spectator ions

• Determine the solubility of compounds

• Write the complete ionic equation

• Balance the molecular equation

How many nitrates are needed to balance the chromium-3 nitrate in the molecular equation?

• Eight

• Six

• Four

• Two

Which of the following compounds is generally insoluble unless bonded to a group one element?

• Carbonates

• Chlorides

• Sulfates

• Nitrates

What happens to chromium-3 carbonate in the reaction?

• It forms a gas

• It dissolves in water

• It remains unchanged

• It becomes a precipitate

What is the purpose of writing a complete ionic equation?

• To balance the charges

• To determine solubility

• To split strong electrolytes into ions

• To identify the precipitate

Which ions are considered spectator ions in this reaction?

• Chromium ions

• Lithium ions

• Carbonate ions

• Hydrogen ions

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

• Positive

• Negative

• Zero

• Variable

How do you ensure that the net ionic equation is balanced?

• By balancing the states of matter

• By balancing both atoms and charges

• By balancing the charges only

• By balancing the number of atoms only

What is the role of lithium ions in the reaction?

• They react with chromium ions

• They act as spectator ions

• They change the state of the solution

• They form a precipitate

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

• Determining solubility

• Ensuring charge and atom balance

• Identifying spectator ions

• Balancing the molecular equation