Net Ionic Equations and Spectator Ions

The video tutorial explains how to write a balanced net ionic equation for the reaction between copper (II) nitrate and hydrogen sulfide gas. It begins by balancing the molecular equation, then assigns states to each substance, noting solubility and exceptions. The tutorial proceeds to split strong electrolytes into ions for the complete ionic equation, identifies spectator ions, and removes them to derive the net ionic equation. The video concludes by verifying charge and atom balance, with a note on the treatment of weak electrolytes.

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

• Identify spectator ions

• Balance the molecular equation

• Split strong electrolytes into ions

• Determine the states of substances

Why is copper(II) sulfide considered a solid in the reaction?

• It is soluble in water

• It is a gas

• It is a strong electrolyte

• It forms a precipitate

Which substance is a strong acid in the reaction?

• Copper(II) nitrate

• Copper(II) sulfide

• Hydrogen sulfide

• Nitric acid

Which of the following is NOT split into ions in the complete ionic equation?

• Nitrate ions

• Nitric acid

• Hydrogen sulfide gas

• Copper(II) nitrate

What is the charge of the copper ion in the reaction?

• 3+

• 2+

• 1+

• 0

What are spectator ions?

• Ions that participate in the reaction

• Ions that do not change during the reaction

• Ions that form a precipitate

• Ions that are gases

What is the purpose of removing spectator ions?

• To split strong electrolytes into ions

• To determine the states of substances

• To simplify the net ionic equation

• To balance the molecular equation

What is the role of nitrate ions in the reaction?

• They are spectator ions

• They are gases

• They form a precipitate

• They are weak electrolytes

How is charge conservation ensured in the net ionic equation?

• By removing all spectator ions

• By ensuring the total charge is the same on both sides

• By dissolving all substances in water

• By balancing the number of atoms

What happens if H2S is considered aqueous instead of a gas?

• It becomes a strong electrolyte

• It is split into ions

• It forms a precipitate

• It remains a weak electrolyte