Net Ionic Equations and Spectator Ions

The video tutorial explains how to balance the net ionic equation for the reaction between aluminum chloride (AlCl3) and sodium sulfide (Na2S). It begins with balancing the molecular equation, followed by determining the states of the substances involved. The tutorial then demonstrates how to form the complete ionic equation by splitting strong electrolytes into ions, while keeping the precipitate intact. Spectator ions are identified and removed to derive the net ionic equation. The tutorial concludes by ensuring that both charge and atom balance are achieved in the final equation.

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

• Balance the molecular equation.

• Determine the states of the substances.

• Split the strong electrolytes into ions.

• Identify the spectator ions.

How do you balance the number of sulfur atoms in the reaction of AlCl3 and Na2S?

• Add a coefficient of 6 in front of Na2S.

• Add a coefficient of 3 in front of Na2S.

• Add a coefficient of 1 in front of AlCl3.

• Add a coefficient of 2 in front of AlCl3.

Which of the following is generally insoluble?

• Aluminum sulfide

• Sodium chloride

• Sodium sulfide

• Aluminum chloride

What is the role of a precipitate in a chemical reaction?

• It dissolves in the solution.

• It remains as a gas.

• It increases the reaction rate.

• It forms a solid that settles out of the solution.

What do you do with spectator ions in a net ionic equation?

• Cross them out as they appear on both sides.

• Include them in the final equation.

• Convert them into solids.

• Use them to balance the equation.

Which ions are considered spectator ions in the reaction of AlCl3 and Na2S?

• Chloride ions

• Sodium ions

• Sulfide ions

• Aluminum ions

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

• Zero

• Negative

• Positive

• Depends on the reaction

How do you ensure the net ionic equation is balanced?

• By balancing only the atoms.

• By balancing both charge and atoms.

• By balancing only the charge.

• By balancing the coefficients.

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

• Identifying the precipitate.

• Writing the complete ionic equation.

• Ensuring charge and atom balance.

• Balancing the molecular equation.

What is the net ionic equation for the reaction between AlCl3 and Na2S?

• Al^3+ + 3S^2- → AlS3

• 3Al^3+ + 2S^2- → Al3S2

• Al^3+ + S^2- → AlS

• 2Al^3+ + 3S^2- → Al2S3