Net Ionic Equations and Spectator Ions

This video tutorial explains how to write a balanced net ionic equation for the reaction between copper(II) chloride (CuCl2) and sodium hydroxide (NaOH). It covers balancing the molecular equation, determining the states of substances, writing the complete ionic equation, and identifying spectator ions to derive the net ionic equation. The tutorial emphasizes the solubility rules and the importance of balancing both atoms and charges in chemical equations.

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

• Identify spectator ions

• Balance the molecular equation

• Split strong electrolytes into ions

• Assign states to each substance

Why do we write 'aq' for chloride compounds in the reaction?

• They are insoluble in water

• They are gases at room temperature

• They dissolve and dissociate in water

• They form a precipitate

Which of the following is generally insoluble in water?

• Copper(II) hydroxide

• Sodium chloride

• Potassium hydroxide

• Sodium hydroxide

What is the charge of copper in copper(II) chloride?

• 2-

• 2+

• 1+

• 1-

What do we call ions that do not participate in the reaction?

• Neutral ions

• Reactant ions

• Spectator ions

• Product ions

Which ions are removed to form the net ionic equation?

• Product ions

• All ions

• Only reactant ions

• Spectator ions

What is the net ionic equation for the reaction between copper(II) chloride and sodium hydroxide?

• Cu^2+ + 2OH^- → Cu(OH)2

• Na^+ + Cl^- → NaCl

• CuCl2 + 2NaOH → Cu(OH)2 + 2NaCl

• 2Na^+ + 2Cl^- → 2NaCl

What ensures that the net ionic equation is balanced?

• Equal number of electrons on both sides

• Equal number of ions on both sides

• Equal number of molecules on both sides

• Equal number of atoms on both sides

What is the state of copper(II) hydroxide in the reaction?

• Aqueous

• Gas

• Solid

• Liquid

What is the role of sodium ions in the net ionic equation?

• Reactant

• Product

• Spectator ion

• Catalyst