Net Ionic Equations and Spectator Ions

The video tutorial explains how to balance the net ionic equation for the reaction between magnesium carbonate (MgCO3) and perchloric acid (HClO4). It begins by balancing the molecular equation and identifying the states of each substance. The tutorial then demonstrates how to write the complete ionic equation by splitting strong electrolytes into ions, while keeping solids, liquids, and gases intact. Spectator ions are identified and removed to form the net ionic equation. The video concludes by ensuring that both charge and atoms are balanced in the final equation.

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

• Write the complete ionic equation

• Balance the molecular equation

• Identify spectator ions

• Determine the solubility of compounds

Which of the following is true about perchloric acid?

• It is a weak acid

• It does not dissociate in water

• It is a strong acid and dissociates completely

• It is insoluble in water

What is the state of magnesium carbonate in the reaction?

• Gas

• Liquid

• Soluble

• Insoluble

What is the purpose of splitting strong electrolytes into ions?

• To balance the equation

• To identify spectator ions

• To form the complete ionic equation

• To determine solubility

Which substances are not split into ions in net ionic equations?

• Solids, liquids, and gases

• Only solids

• Only liquids

• Only gases

What are spectator ions?

• Ions that participate in the reaction

• Ions that are insoluble

• Ions that do not change during the reaction

• Ions that form gases

How do you identify spectator ions in a reaction?

• They are only in the reactants

• They are only in the products

• They appear unchanged on both sides of the equation

• They are gases

What must be conserved in a balanced net ionic equation?

• Only mass

• Both mass and charge

• Neither mass nor charge

• Only charge

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

• 1+

• 0

• 2+

• 3+

Why is it important to count atoms in the final net ionic equation?

• To determine solubility

• To identify spectator ions

• To find the molecular weight

• To ensure the equation is balanced