Net Ionic Equations and Reactions

The video tutorial explains how to write the balanced net ionic equation for the reaction between cobalt(II) chloride (CoCl2) and potassium hydroxide (KOH). It begins with balancing the molecular equation, followed by determining the solubility and states of the substances involved. The tutorial then breaks down the complete ionic equation, identifying the ions present. Finally, it derives the net ionic equation by removing spectator ions, ensuring the charges and atoms are balanced. The video concludes with a summary of the balanced net ionic equation.

What is the first step in writing the balanced net ionic equation for CoCl2 and KOH?

• Determine the solubility of the products

• Balance the molecular equation

• Identify the spectator ions

• Write the complete ionic equation

Why is it necessary to balance the molecular equation first?

• To write the net ionic equation directly

• To identify the spectator ions

• To ensure the correct stoichiometry for the reaction

• To determine the solubility of the reactants

Which of the following is generally insoluble?

• Potassium hydroxide

• Sodium hydroxide

• Cobalt(II) hydroxide

• Chloride ions

What happens to cobalt(II) hydroxide in the reaction?

• It dissolves in water

• It forms a precipitate

• It remains as ions in solution

• It reacts with chloride ions

What is the charge on the cobalt ion in the complete ionic equation?

• 1-

• 2-

• 2+

• 1+

Which ions are considered spectator ions in this reaction?

• Potassium ions

• Cobalt(II) hydroxide

• Hydroxide ions

• Cobalt ions

What is the purpose of identifying spectator ions?

• To balance the molecular equation

• To simplify the net ionic equation

• To calculate the reaction yield

• To determine the solubility of compounds

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

• 1+

• 0

• 2-

• 2+

Why is it important to ensure the net ionic equation is balanced?

• To identify the limiting reactant

• To confirm the conservation of mass and charge

• To ensure the reaction is spontaneous

• To predict the products of the reaction

What is the final product formed in the reaction between CoCl2 and KOH?

• Cobalt(II) chloride

• Cobalt(II) hydroxide

• Potassium chloride

• Potassium hydroxide