Balancing Reactions and Ionic Equations

The video tutorial explains how to write the balanced net ionic equation for the reaction between nickel and hydrochloric acid. It begins with balancing the molecular equation, assigning states to each substance, and forming the complete ionic equation. The tutorial then demonstrates how to derive the net ionic equation by removing spectator ions, ensuring charge conservation, and verifying the balance of atoms. The process is explained step-by-step, highlighting key concepts such as the solubility of substances and the charges of ions involved.

Why is concentrated hydrochloric acid needed for the reaction with nickel?

• Because nickel is highly reactive

• Because the reaction is very slow

• Because nickel is a gas

• Because hydrochloric acid is weak

What is the first step in balancing the molecular equation for nickel and hydrochloric acid?

• Changing the state of nickel

• Adding more hydrochloric acid

• Balancing the number of hydrogen atoms

• Adjusting the coefficients of nickel

What state is assigned to nickel in the reaction?

• Liquid

• Aqueous

• Gas

• Solid

Which of the following is a strong acid in the reaction?

• Chloride ion

• Nickel

• Hydrochloric acid

• Hydrogen gas

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

• 1-

• 1+

• 2+

• 0

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

• 1-

• 0

• 2+

• 1+

What is the charge of the nickel ion in the products?

• 1-

• 2+

• 2-

• 1+

What is the purpose of identifying spectator ions in the complete ionic equation?

• To balance the equation

• To simplify the equation

• To change the state of substances

• To increase the reaction rate

What is conserved in the net ionic equation?

• Charge only

• Mass only

• Both mass and charge

• Neither mass nor charge

What happens to the spectator ions in the net ionic equation?

• They are included in the final equation

• They are removed from the equation

• They change their state

• They become reactants