Net Ionic Equations and Spectator Ions

This video tutorial guides viewers through writing a balanced net ionic equation for the reaction between cobalt(II) sulfate and ammonium phosphate. It begins with balancing the molecular equation, followed by determining the solubility and states of the substances involved. The tutorial then explains how to form the complete ionic equation and identify spectator ions to derive the net ionic equation. The video concludes with a review of charge conservation and atom balance in the final net ionic equation.

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

• Identify spectator ions

• Balance the molecular equation

• Determine solubility

• Write the complete ionic equation

How many cobalt atoms are needed to balance the molecular equation?

• Three

• Four

• One

• Two

Which of the following is generally soluble?

• Cobalt(II) phosphate

• Silver chloride

• Ammonium compounds

• Lead(II) sulfate

What happens to cobalt(II) phosphate when it forms in a reaction?

• It dissolves in water

• It forms a gas

• It precipitates as a solid

• It remains unchanged

What are spectator ions?

• Ions that participate in the reaction

• Ions that do not change during the reaction

• Ions that are insoluble

• Ions that form a precipitate

Which ions are removed to form the net ionic equation?

• Ions with a positive charge

• Only the ions that form a precipitate

• Spectator ions

• All ions

What is the role of ammonium ions in the reaction?

• They form a precipitate

• They act as spectator ions

• They change the color of the solution

• They increase the reaction rate

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

• Depends on the reaction

• Positive

• Negative

• Zero

How do you ensure the net ionic equation is balanced?

• By ensuring all compounds are soluble

• By checking both atoms and charge

• By checking the charge only

• By checking the number of atoms only

Why is it important to write the states of substances in a net ionic equation?

• To determine the color of the solution

• To identify the phase of each substance

• To calculate the reaction rate

• To predict the temperature change