Net Ionic Equations and Spectator Ions

The video tutorial explains how to write a balanced net ionic equation for the reaction between magnesium bromide (MgBr2) and potassium hydroxide (KOH). It begins with balancing the molecular equation, ensuring that all atoms are accounted for on both sides. The tutorial then discusses the solubility of the compounds involved, noting that magnesium hydroxide is insoluble and forms a solid. The complete ionic equation is derived by splitting strong electrolytes into ions, and spectator ions are identified and removed. The final net ionic equation is presented, demonstrating the conservation of charge and balanced atoms.

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

• Identify spectator ions

• Balance the molecular equation

• Write the complete ionic equation

• Determine the solubility of compounds

How do you balance bromine atoms in the equation?

• Add a coefficient of 2 to bromine

• Add a coefficient of 2 to potassium hydroxide

• Add a coefficient of 2 to potassium

• Add a coefficient of 2 to magnesium bromide

Which of the following is generally insoluble?

• Bromide ions

• Magnesium hydroxide

• Magnesium bromide

• Potassium hydroxide

What happens to solids in net ionic equations?

• They are split into ions

• They are left intact

• They are dissolved

• They are ignored

What is the purpose of writing the complete ionic equation?

• To finalize the net ionic equation

• To balance the charges

• To identify spectator ions

• To determine solubility

Which ions are considered spectator ions in this reaction?

• Bromide ions

• Magnesium hydroxide

• Magnesium ions

• Hydroxide ions

What is the net charge of the reactants in the net ionic equation?

• 2+

• 2-

• 0

• 1+

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

• To ensure the reaction is possible

• To identify spectator ions

• To balance the molecular equation

• To determine solubility

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

• Identifying spectator ions

• Balancing the molecular equation

• Determining solubility

• Ensuring charge and atom balance

What is the net ionic equation for the reaction between magnesium bromide and potassium hydroxide?

• Mg^2+ + 2OH^- → Mg(OH)_2

• MgBr_2 + 2KOH → Mg(OH)_2 + 2KBr

• 2K^+ + 2Br^- → 2KBr

• Mg^2+ + 2Br^- → MgBr_2