Net Ionic Equations and Electrolytes

The video tutorial explains how to write and balance a net ionic equation for the reaction between concentrated nitric acid and magnesium. It covers the steps of balancing the molecular equation, assigning states to substances, dissociating strong electrolytes, forming the complete ionic equation, and identifying spectator ions. The tutorial concludes with ensuring that both charge and atom counts are balanced in the final net ionic equation.

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

• Determine the states of substances

• Write the complete ionic equation

• Balance the molecular equation

• Identify spectator ions

Why is it important to balance the molecular equation first?

• To find the spectator ions

• To determine the states of substances

• To ensure the net ionic equation is correct

• To identify the products

What state is assigned to nitric acid in the reaction?

• Aqueous

• Solid

• Liquid

• Gas

Which of the following is a strong electrolyte in the reaction?

• Magnesium

• Water

• Nitric acid

• Oxygen

What is the purpose of writing the complete ionic equation?

• To find the limiting reactant

• To determine the products

• To balance charges

• To identify spectator ions

How do you identify spectator ions in the complete ionic equation?

• They have a charge of zero

• They are only in the products

• They are only in the reactants

• They appear on both sides of the equation

What happens to the nitrate ions in the net ionic equation?

• They are canceled out

• They are balanced

• They change state

• They form a precipitate

What must be balanced in the final net ionic equation?

• Neither atoms nor charges

• Only the charges

• Only the atoms

• Both atoms and charges

What is the charge on the magnesium in the net ionic equation?

• 0

• 1+

• 2+

• 3+

What is the significance of ensuring charge balance in the net ionic equation?

• It identifies the limiting reactant

• It determines the reaction rate

• It confirms the reaction is spontaneous

• It ensures the equation is correct