Net Ionic Equations and Solubility

The video tutorial explains how to write a balanced net ionic equation for the reaction between magnesium nitrate and ammonium hydroxide. It begins with balancing the molecular equation by adjusting coefficients to ensure equal numbers of each type of ion on both sides. The tutorial then discusses solubility rules to determine the states of the compounds involved, identifying magnesium hydroxide as a precipitate. The complete ionic equation is formed by splitting strong electrolytes into ions, and spectator ions are identified and removed to derive the net ionic equation. The tutorial concludes by verifying that both charge and atom balance are achieved in the final equation.

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

• Identify spectator ions

• Balance the molecular equation

• Determine solubility

• Write the complete ionic equation

How do you balance the ammonium ions in the molecular equation?

• Add a coefficient of 2 in front of ammonium nitrate

• Add a coefficient of 3 in front of ammonium hydroxide

• Remove nitrate ions

• Add a coefficient of 2 in front of magnesium nitrate

Which of the following is generally soluble?

• Ammonium ion compounds

• Magnesium hydroxide

• Lead sulfate

• Silver chloride

What forms when magnesium nitrate reacts with ammonium hydroxide?

• A liquid

• A gas

• A precipitate

• A color change

What is the purpose of identifying spectator ions?

• To identify the precipitate

• To determine solubility

• To simplify the equation

• To balance the equation

Which ions are considered spectator ions in this reaction?

• Nitrate ions

• Magnesium ions

• Ammonium ions

• Hydroxide ions

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

• Positive one

• Zero

• Positive two

• Negative two

How is charge balance achieved in the net ionic equation?

• By adding more ions

• By removing spectator ions

• By changing the coefficients

• By ensuring the net charge is zero

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

• Ensuring charge balance

• Balancing the atoms

• Writing the complete ionic equation

• Identifying the precipitate

What is the net ionic equation for the reaction between magnesium nitrate and ammonium hydroxide?

• Mg^2+ + 2NO3^- → Mg(NO3)2

• Mg^2+ + 2OH^- → Mg(OH)2

• NH4^+ + OH^- → NH3 + H2O

• 2NH4^+ + 2OH^- → 2NH3 + 2H2O