Net Ionic Equations and Reactions

The video tutorial explains how to write and balance net ionic equations, using the reaction between potassium hydroxide (KOH) and magnesium sulfate (MgSO4) as an example. It covers balancing the molecular equation, determining the states of substances, and identifying spectator ions to form the net ionic equation. The tutorial emphasizes the importance of charge balance and atom count in the final equation.

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

• Identify spectator ions

• Balance the molecular equation

• Determine the states of substances

• Write the complete ionic equation

How many potassium atoms are needed to balance the molecular equation for KOH and MgSO4?

• One

• Two

• Four

• Three

Which of the following is a strong base?

• Magnesium hydroxide

• Magnesium sulfate

• Sodium sulfate

• Potassium hydroxide

What is the state of magnesium hydroxide in the reaction?

• Solid

• Liquid

• Gas

• Aqueous

What do we call ions that do not participate in the reaction?

• Reactive ions

• Neutral ions

• Spectator ions

• Active ions

Which ions are crossed out as spectator ions in the reaction?

• Potassium ions

• Magnesium ions

• Hydroxide ions

• Sulfate ions

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

• Variable

• Zero

• Negative

• Positive

What is the charge of magnesium hydroxide in the net ionic equation?

• Variable

• Negative

• Positive

• Zero

What is the purpose of balancing the net ionic equation?

• To identify spectator ions

• To write the molecular equation

• To determine solubility

• To ensure charge and atom balance

Which compound is a precipitate in the reaction?

• Potassium sulfate

• Magnesium hydroxide

• Magnesium sulfate

• Potassium hydroxide