Net Ionic Equations and Spectator Ions

This video tutorial explains how to write a balanced net ionic equation for the reaction between magnesium and copper(II) nitrate. It covers balancing the molecular equation, determining the states of substances, splitting strong electrolytes into ions, and identifying spectator ions to derive the net ionic equation. The tutorial emphasizes the conservation of charge and mass throughout the process.

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

• Write the complete ionic equation

• Determine the solubility of compounds

• Balance the molecular equation

• Identify spectator ions

Why is magnesium considered a solid in the reaction?

• It is a gas

• It is a transition metal

• It is a strong electrolyte

• It is a metal

What is the solubility rule for nitrates?

• They are insoluble

• They are slightly soluble

• They are very soluble

• They are soluble only in acids

How do you determine the charge of a transition metal like copper in a compound?

• By the charge of the accompanying anion

• By its position in the periodic table

• By its atomic number

• By its color

What is the charge of the copper ion in copper(II) nitrate?

• 3+

• 0

• 2+

• 1+

What are spectator ions?

• Ions that participate in the reaction

• Ions that change during the reaction

• Ions that are only present in the products

• Ions that remain unchanged on both sides of the equation

Which ions are crossed out to form the net ionic equation?

• All ions

• Only the reactant ions

• Product ions

• Spectator ions

What is conserved in a balanced net ionic equation?

• Only mass

• Only charge

• Both mass and charge

• Neither mass nor charge

What is the net ionic equation for the reaction between magnesium and copper(II) nitrate?

• Cu + 2NO3^- -> Cu(NO3)2

• Mg^2+ + Cu -> Mg + Cu^2+

• Mg + 2NO3^- -> Mg(NO3)2

• Mg + Cu^2+ -> Mg^2+ + Cu

Why is it important to ensure charge conservation in a net ionic equation?

• To balance the equation

• To ensure the reaction occurs

• To satisfy the law of conservation of charge

• To satisfy the law of conservation of mass