Net Ionic Equations and Spectator Ions

The video tutorial explains how to write a balanced net ionic equation for the reaction involving magnesium nitrate, ammonia, and water. It begins with balancing the molecular equation and identifying the states of each substance, emphasizing the solubility of nitrates and the nature of ammonia as a weak base. The tutorial then guides viewers through recognizing precipitates, specifically magnesium hydroxide, and forming the complete ionic equation by identifying spectator ions. Finally, it demonstrates how to write the net ionic equation, ensuring both charge and atom balance are maintained.

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

Why are nitrates considered very soluble?

• They form strong acids

• They are weak bases

• They are insoluble in water

• They dissolve easily in water

What is the state of ammonia in the reaction?

• Liquid

• Aqueous

• Solid

• Gas

Why is magnesium hydroxide considered insoluble?

• It reacts with ammonia

• It is a strong electrolyte

• It does not dissolve in water

• It forms a gas

What role does ammonia play in the reaction?

• Strong base

• Neutral compound

• Strong acid

• Weak base

What are spectator ions?

• Ions that form a precipitate

• Ions that are insoluble

• Ions that do not change during the reaction

• Ions that participate in the reaction

Which ions are considered spectator ions in this reaction?

• Magnesium ions

• Ammonium ions

• Nitrate ions

• Hydroxide ions

What is the charge balance in the net ionic equation?

• One side is more positive

• One side is more negative

• Both sides have the same charge

• Charge is not considered

Why is it important to ensure atom balance in the net ionic equation?

• To make the equation look neat

• To satisfy the law of conservation of mass

• To determine solubility

• To identify spectator ions

What is the final product of the reaction?

• Magnesium hydroxide

• Water

• Magnesium nitrate

• Ammonium hydroxide