Net Ionic Equations and Spectator Ions

The video tutorial explains how to write and balance a net ionic equation for the reaction between chromium(III) sulfate and potassium hydroxide. It begins with balancing the molecular equation, identifying the solubility and states of the reactants and products, and then writing the complete ionic equation. Spectator ions are identified and removed to derive the net ionic equation. The tutorial concludes by ensuring the charges and atoms are balanced in the final equation.

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

• Identify spectator ions

• Balance the molecular equation

• Write the complete ionic equation

• Determine solubility

How many chromiums are present after balancing the molecular equation?

• Four

• Three

• Two

• One

What is the coefficient of KOH after balancing the molecular equation?

• Eight

• Four

• Two

• Six

Which of the following is generally insoluble?

• Potassium hydroxide

• Sulfates

• Nitrates

• Chromium hydroxide

What happens to chromium hydroxide in the reaction?

• It forms a precipitate

• It remains unchanged

• It forms a gas

• It dissolves

What is the purpose of writing a complete ionic equation?

• To determine solubility

• To identify spectator ions

• To find the net ionic equation

• To balance charges

Which ions are considered spectator ions in this reaction?

• Potassium ions

• Sulfate ions

• Hydroxide ions

• Chromium ions

What is the net charge of the balanced net ionic equation?

• Negative

• Positive

• Zero

• Variable

How can the coefficients in the net ionic equation be simplified?

• By multiplying by 2

• By dividing by 2

• By subtracting 1

• By adding 1

What must be balanced in the net ionic equation besides atoms?

• Volume

• Moles

• Mass

• Charges