Spectator Ions and Ionic Equations

The video tutorial explains how to write the balanced net ionic equation for the reaction between zinc and dilute nitric acid. It covers balancing the molecular equation, determining the states of substances, forming the complete ionic equation, and deriving the net ionic equation by removing spectator ions. The tutorial emphasizes the importance of charge and mass conservation in chemical reactions.

What is the main difference in products when using concentrated versus dilute nitric acid with zinc?

• Concentrated nitric acid produces zinc nitrate and oxygen gas.

• Dilute nitric acid produces zinc oxide and water.

• Dilute nitric acid produces zinc nitrate and hydrogen gas.

• Concentrated nitric acid produces zinc oxide.

What is the first step in balancing a molecular equation?

• Identify the spectator ions.

• Determine the states of each substance.

• Ensure the number of atoms is equal on both sides.

• Split strong electrolytes into ions.

Which of the following is a strong electrolyte in the reaction between zinc and dilute nitric acid?

• Hydrogen gas

• Nitric acid

• Zinc metal

• Zinc oxide

What is the state of zinc in the reaction with dilute nitric acid?

• Gas

• Aqueous

• Liquid

• Solid

In the complete ionic equation, which ion is not split into its components?

• Zinc metal

• Nitrate ion

• Hydrogen ion

• Zinc ion

What is the charge of the zinc ion in the complete ionic equation?

• 1+

• 2+

• 1-

• 2-

Which ions are considered spectator ions in the reaction?

• Nitrate ions

• Hydroxide ions

• Zinc ions

• Hydrogen ions

What is the purpose of removing spectator ions in a net ionic equation?

• To determine the solubility of the compounds.

• To identify the states of each substance.

• To balance the charges on both sides of the equation.

• To simplify the equation by showing only the ions that participate in the reaction.

How is charge conservation demonstrated in the net ionic equation?

• By ensuring the number of atoms is equal on both sides.

• By having the same number of positive and negative charges on both sides.

• By balancing the molecular equation.

• By splitting strong electrolytes into ions.

What is the final product of the net ionic equation for the reaction between zinc and dilute nitric acid?

• Zinc oxide

• Zinc nitrate

• Zinc ions and hydrogen gas

• Zinc metal and water