Net Ionic Equations and Spectator Ions

This video tutorial guides viewers through balancing the net ionic equation for the reaction between magnesium chloride (MgCl2) and potassium hydroxide (KOH). It begins with balancing the molecular equation, assigning states to each substance, and then splitting strong electrolytes into ions to form the complete ionic equation. The tutorial proceeds to identify and eliminate spectator ions, resulting in the net ionic equation. The video emphasizes the importance of charge conservation and atom balance throughout the process.

What is the first step in balancing the molecular equation for MgCl2 and KOH?

• Balance the potassium ions

• Balance the hydroxide ions

• Balance the chlorine atoms

• Balance the magnesium ions

Which of the following compounds is considered insoluble in the reaction?

• Potassium chloride

• Magnesium hydroxide

• Potassium hydroxide

• Magnesium chloride

Which compound forms a solid precipitate in the reaction?

• Magnesium hydroxide

• Magnesium chloride

• Potassium chloride

• Potassium hydroxide

What is the charge of the magnesium ion in the complete ionic equation?

• 2-

• 1+

• 2+

• 1-

How many chloride ions are present in the reactants of the complete ionic equation?

• Four

• Two

• Three

• One

Why are solids not split into ions in net ionic equations?

• They have no charge

• They do not dissolve in water

• They are already balanced

• They are spectator ions

Which ions are considered spectator ions in this reaction?

• Magnesium ions

• Hydroxide ions

• Potassium ions

• Chloride ions

What is the role of potassium ions in the reaction?

• They balance the equation

• They react with magnesium

• They are spectator ions

• They form a precipitate

What is the net charge on both sides of the net ionic equation?

• 2+

• 1-

• 1+

• 0

What ensures that the net ionic equation is correctly balanced?

• Equal number of ions on both sides

• Equal number of atoms on both sides

• Equal number of molecules on both sides

• Equal number of compounds on both sides