Net Ionic Equations and Balancing Reactions

The video tutorial explains how to write the balanced net ionic equation for the reaction between hydroiodic acid (HI) and calcium hydroxide (Ca(OH)2). It begins with balancing the molecular equation, followed by determining the states of each substance. The tutorial then demonstrates how to split strong electrolytes into ions to form the complete ionic equation. Finally, it shows how to derive the net ionic equation by removing spectator ions, ensuring charge and mass conservation.

What is the first step in balancing the molecular equation for the reaction between HI and Ca(OH)2?

• Balance the oxygen atoms.

• Balance the hydrogen atoms.

• Balance the iodine atoms.

• Balance the calcium atoms.

Which of the following is a strong acid that dissociates completely in water?

• Calcium hydroxide

• Iodine

• Hydroiodic acid

• Water

What state is assigned to calcium hydroxide in the reaction?

• Liquid

• Solid

• Gas

• Aqueous

When splitting strong electrolytes into ions, what is the charge of the hydrogen ion (H+)?

• 2-

• 1-

• 2+

• 1+

In the complete ionic equation, what is the charge of the calcium ion (Ca2+)?

• 1+

• 1-

• 2-

• 2+

What are spectator ions in a chemical reaction?

• Ions that are only present in the reactants

• Ions that do not change during the reaction

• Ions that participate in the reaction

• Ions that are only present in the products

Which ions are removed as spectator ions in the reaction between HI and Ca(OH)2?

• Iodide ions

• Hydrogen ions

• Calcium ions

• Hydroxide ions

What is the final net ionic equation for the reaction between hydroiodic acid and calcium hydroxide?

• 2H+ + 2OH- → H2O

• 2H+ + 2OH- → 2H2O

• Ca2+ + 2I- → CaI2

• H+ + OH- → H2O

Why is it important to ensure that charge is conserved in a net ionic equation?

• To balance the equation

• To ensure the reaction is spontaneous

• To increase the reaction rate

• To maintain electrical neutrality

What does the conservation of mass in a chemical reaction imply?

• The total mass of reactants equals the total mass of products.

• The mass of products is greater than the mass of reactants.

• The mass of reactants is greater than the mass of products.

• Mass is not conserved in chemical reactions.