Net Ionic Equations and Spectator Ions

This video tutorial explains how to write a balanced net ionic equation for the reaction between potassium sulfide and copper(II) nitrate. It begins with balancing the molecular equation, followed by determining the solubility and states of the substances involved. The tutorial then demonstrates how to split strong electrolytes into ions to form the complete ionic equation. By removing spectator ions, the net ionic equation is derived. The video concludes with a discussion on charge conservation and the neutrality of the final compound.

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

• Determine the solubility of compounds

• Identify spectator ions

• Balance the molecular equation

• Write the complete ionic equation

Why is it important to know the solubility rules when writing net ionic equations?

• To measure the temperature change

• To predict the formation of a precipitate

• To determine the color of the solution

• To calculate the reaction rate

Which of the following compounds is generally insoluble?

• Potassium nitrate

• Copper(II) sulfide

• Sodium chloride

• Ammonium sulfate

What is the charge of the sulfide ion?

• 1+

• 2+

• 2-

• 1-

In the complete ionic equation, which ion is not split into its constituent ions?

• Nitrate ion

• Potassium ion

• Copper(II) sulfide

• Sulfide ion

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

• To balance the molecular equation

• To increase the reaction rate

• To simplify the net ionic equation

• To determine the reaction temperature

Which ions are considered spectator ions in the reaction between potassium sulfide and copper(II) nitrate?

• Ammonium and sulfate ions

• Sodium and chloride ions

• Copper and sulfide ions

• Potassium and nitrate ions

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

• 2+

• 0

• 1+

• 2-

Why is it important to ensure charge conservation in a net ionic equation?

• To measure the energy change

• To predict the color change

• To ensure the equation is balanced

• To determine the reaction speed

In a net ionic equation, which ion is typically written first?

• The ion with the smallest atomic radius

• The ion with the largest atomic mass

• The positively charged ion

• The negatively charged ion