Net Ionic Equations and Spectator Ions

The video tutorial explains how to write a balanced net ionic equation for the reaction between cobalt(II) chloride and calcium hydroxide. It begins with balancing the molecular equation and identifying the states of each compound. The tutorial discusses the solubility of compounds, particularly the exceptions for calcium hydroxide. It then proceeds to form the complete ionic equation by splitting strong electrolytes into ions. Spectator ions are identified and removed to derive the net ionic equation. Finally, the video ensures that the equation is balanced in terms of both charge and atoms.

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

• Identify spectator ions

• Determine the solubility of compounds

• Balance the molecular equation

• Write the complete ionic equation

Which of the following is generally soluble in water?

• Silver bromide

• Lead chloride

• Calcium hydroxide

• Cobalt hydroxide

What happens to cobalt hydroxide in the reaction?

• It dissolves in water

• It forms a gas

• It precipitates as a solid

• It remains unchanged

What is the purpose of splitting strong electrolytes into ions?

• To form the complete ionic equation

• To determine solubility

• To balance the equation

• To identify spectator ions

Which ions are considered spectator ions in this reaction?

• Calcium ions

• Chloride ions

• Hydroxide ions

• Cobalt ions

What is the net ionic equation derived from?

• The balanced molecular equation

• The initial reactants

• The complete ionic equation

• The solubility rules

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

• To identify spectator ions

• To confirm the reaction occurs

• To satisfy the law of conservation of mass

• To ensure the equation is neutral

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

• Depends on the reactants

• Zero

• Negative

• Positive

What is the role of calcium ions in this reaction?

• They form a precipitate

• They are spectator ions

• They react with chloride ions

• They dissolve in water

What is the significance of balancing atoms in the net ionic equation?

• To ensure the reaction is complete

• To maintain the law of conservation of mass

• To identify the limiting reactant

• To determine the reaction rate