Net Ionic Equations and Spectator Ions

This video tutorial guides viewers through writing a balanced net ionic equation for the reaction between zinc chloride (ZnCl2) and potassium sulfide (K2S). It begins with balancing the molecular equation, followed by determining the states of each substance using solubility rules. The tutorial then explains how to split strong electrolytes into ions to form the complete ionic equation. Finally, it demonstrates how to identify and remove spectator ions to derive the net ionic equation, ensuring both atoms and charges are balanced.

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

• Determine the states of substances

• Balance the molecular equation

• Identify spectator ions

• Split strong electrolytes into ions

According to solubility rules, which of the following is generally insoluble?

• Nitrates

• Chlorides

• Potassium compounds

• Sulfides

What state is assigned to zinc sulfide in the reaction?

• Solid

• Aqueous

• Gas

• Liquid

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

• 1+

• 2+

• 2-

• 1-

Which ions are not split in the complete ionic equation?

• Aqueous ions

• Liquid reactants

• Solid precipitates

• Gaseous products

What are spectator ions?

• Ions that are gases

• Ions that do not change during the reaction

• Ions that participate in the reaction

• Ions that form a precipitate

Which ions are removed to form the net ionic equation?

• Reactant ions

• Product ions

• Spectator ions

• All ions

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

• 0

• 1+

• 2+

• 2-

What ensures the net ionic equation is balanced?

• Equal number of molecules on both sides

• Equal number of electrons on both sides

• Equal number of atoms on both sides

• Equal number of ions on both sides

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

• Counting the atoms

• Crossing out spectator ions

• Writing the states of substances

• Balancing the molecular equation