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 zinc (Zn). It covers the steps to balance the molecular equation, determine the states of substances using solubility rules, and split strong electrolytes into ions to form the complete ionic equation. The tutorial then demonstrates how to derive the net ionic equation by removing spectator ions and ensures that charge and atom balance are maintained. The video concludes with a review of the balanced net ionic equation and the importance of charge conservation.

What type of reaction occurs between CuCl2 and Zn?

• Synthesis

• Decomposition

• Single replacement

• Double replacement

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

• Balance the molecular equation

• Split strong electrolytes into ions

• Identify spectator ions

• Determine the states of substances

According to solubility rules, what state is assigned to chlorides?

• Aqueous

• Solid

• Gas

• Liquid

What is the state of zinc in the reaction?

• Aqueous

• Solid

• Liquid

• Gas

What do you need to do to form the complete ionic equation?

• Balance the equation

• Identify spectator ions

• Split strong electrolytes into ions

• Determine the states of substances

What is the charge of the copper ion in CuCl2?

• 0

• 2+

• 3+

• 1+

Which ions are considered spectator ions in this reaction?

• Zinc ions

• Copper ions

• Chloride ions

• Hydrogen ions

What is the net ionic equation for the reaction between CuCl2 and Zn?

• Cu^2+ + Zn -> Cu + Zn^2+

• Cu + Zn^2+ -> Cu^2+ + Zn

• Cu^2+ + 2Cl^- + Zn -> Cu + Zn^2+ + 2Cl^-

• Cu + Zn -> Cu^2+ + Zn^2+

Why are spectator ions removed from the net ionic equation?

• They are not involved in the reaction

• They change the charge balance

• They are gases

• They are solids

What must be conserved in a balanced net ionic equation?

• Neither mass nor charge

• Both mass and charge

• Charge only

• Mass only