Spectator Ions and Net Ionic Equations

The video tutorial explains how to write a balanced net ionic equation for the reaction between copper(II) nitrate and sodium sulfide. It begins with balancing the molecular equation, followed by determining the states of each substance using 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, ensuring charge and mass are balanced.

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

• Identify spectator ions

• Balance the molecular equation

• Determine the solubility of compounds

• Write the complete ionic equation

Which of the following compounds is generally insoluble?

• Copper(II) sulfide

• Potassium compounds

• Sodium compounds

• Nitrate compounds

What does 'aq' signify when writing the states of compounds?

• The compound is insoluble

• The compound is aqueous

• The compound is a gas

• The compound is a solid

What is the charge of a nitrate ion?

• 1+

• 2-

• 1-

• 2+

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

• 2-

• 1-

• 2+

• 1+

What is the purpose of identifying spectator ions?

• To balance the equation

• To simplify the net ionic equation

• To determine solubility

• To find the molecular weight

Which ions are considered spectator ions in this reaction?

• Nitrate and sulfide ions

• Copper and sodium ions

• Copper and sulfide ions

• Sodium and nitrate ions

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

• 2+

• 0

• 1+

• 2-

How many copper atoms are present on each side of the net ionic equation?

• Two

• None

• One

• Three

What ensures that the net ionic equation is balanced?

• Use of coefficients

• Equal number of atoms and charge on both sides

• Solubility of compounds

• Presence of spectator ions