Net Ionic Equations and Spectator Ions

This video tutorial guides viewers through writing a balanced net ionic equation for the reaction between silver nitrate and ammonium chromate. It begins with balancing the molecular equation, assigning states based on solubility rules, and then splitting strong electrolytes into ions for the complete ionic equation. The tutorial identifies and removes spectator ions to derive the net ionic equation, ensuring charge balance and atom count are correct. The video concludes with a summary of the balanced net ionic equation.

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

• Write the complete ionic equation

• Balance the molecular equation

• Identify spectator ions

• Assign states to substances

How do you balance the number of silver atoms in the molecular equation?

• Add a coefficient of two in front of ammonium chromate

• Add a coefficient of two in front of silver nitrate

• Add a coefficient of three in front of nitrate ions

• Add a coefficient of one in front of silver chromate

What state is assigned to silver chromate based on its solubility?

• Gas (G)

• Solid (S)

• Aqueous (AQ)

• Liquid (L)

What is the role of solubility rules in writing net ionic equations?

• To balance charges

• To assign states to substances

• To identify spectator ions

• To determine the coefficients

Which ions are considered spectator ions in this reaction?

• Silver ions and nitrate ions

• Silver ions and chromate ions

• Chromate ions and ammonium ions

• Ammonium ions and nitrate ions

What is the charge of the chromate ion?

• 1-

• 2+

• 2-

• 1+

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

• 2+

• 0

• 1-

• 2-

What is the final net ionic equation for the reaction?

• 2Ag+ + 2NO3- → Ag2(NO3)2

• NH4+ + CrO4^2- → (NH4)2CrO4

• Ag+ + NO3- → AgNO3

• 2Ag+ + CrO4^2- → Ag2CrO4

Why are spectator ions removed from the net ionic equation?

• They do not participate in the reaction

• They change the charge balance

• They are insoluble

• They form a precipitate

What is the significance of balancing charges in a net ionic equation?

• To determine solubility

• To predict the products

• To ensure the equation is neutral

• To identify spectator ions