Net Ionic Equations and Spectator Ions

The video tutorial explains how to write a balanced net ionic equation for the reaction between silver nitrate (AgNO3) and cobalt(II) chloride (CoCl2). It begins with balancing the molecular equation, followed by determining the states of each substance based on solubility rules. The tutorial then demonstrates how to write the complete ionic equation by splitting strong electrolytes into ions. Finally, it shows how to derive the net ionic equation by removing spectator ions, resulting in a simplified equation. The video concludes with a brief summary and thanks to the viewers.

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

• Assign oxidation states

• Identify spectator ions

• Determine the limiting reactant

• Balance the molecular equation

Why is it important to assign states to each compound in a reaction?

• To find the molecular weight

• To determine the reaction temperature

• To identify the formation of a precipitate

• To calculate the reaction rate

Which of the following compounds is not soluble in water?

• Silver nitrate

• Sodium chloride

• Silver chloride

• Cobalt(II) chloride

What is the charge of a silver ion in the complete ionic equation?

• 1-

• 1+

• 2+

• 2-

In the complete ionic equation, what is the charge of the cobalt ion?

• 0

• 1+

• 2+

• 3+

What is the purpose of identifying spectator ions in a reaction?

• To determine the reaction temperature

• To balance the molecular equation

• To simplify the net ionic equation

• To increase the reaction rate

Which ions are considered spectator ions in the reaction between silver nitrate and cobalt(II) chloride?

• Silver ions

• Chloride ions

• Nitrate ions

• Cobalt ions

What is the final step in simplifying the net ionic equation?

• Adding more reactants

• Removing common coefficients

• Increasing the temperature

• Adding a catalyst

What happens to the coefficients in the net ionic equation if they are the same for all substances?

• They are halved

• They are removed

• They are doubled

• They are squared

What is the net ionic equation for the reaction between silver nitrate and cobalt(II) chloride?

• Ag+ + NO3- → AgNO3

• Ag+ + Cl- → AgCl

• 2Ag+ + 2Cl- → 2AgCl

• AgNO3 + CoCl2 → AgCl + Co(NO3)2