Balancing Redox Reactions Concepts

The video tutorial explains how to balance a redox reaction using the ion-electron method, also known as the half-reaction method. It begins with determining oxidation numbers, then writing half-reactions for the species of interest. The tutorial continues by balancing atoms and charges, using water and hydrogen ions in an acidic medium. Finally, it balances the overall reaction by ensuring equal electrons on both sides and simplifies the equation. The video concludes with verifying the balanced reaction by checking charges and atom counts.

What is the first step in balancing a redox reaction using the ion-electron method?

• Combine the half-reactions.

• Add water molecules to balance oxygen.

• Add electrons to balance charge.

• Determine the oxidation numbers of each element.

Which element undergoes reduction in the given redox reaction?

• Bromine

• Nitrogen

• Oxygen

• Hydrogen

How do you balance oxygen atoms in a redox reaction occurring in water?

• By adding hydrogen ions

• By adding electrons

• By adding water molecules

• By adding oxygen gas

In an acidic medium, how are hydrogen atoms balanced in a redox reaction?

• By adding hydrogen ions

• By adding oxygen gas

• By adding water molecules

• By adding electrons

What is added to balance the charge in a half-reaction?

• Water molecules

• Hydrogen ions

• Electrons

• Oxygen gas

How many electrons are needed to balance the charge in the bromine half-reaction?

• 4 electrons

• 6 electrons

• 8 electrons

• 10 electrons

What is the purpose of multiplying the half-reactions by different factors?

• To balance the number of ions

• To balance the number of electrons

• To balance the number of atoms

• To balance the number of molecules

What is the final step in simplifying the overall redox reaction?

• Rewriting the half-reactions

• Adding more reactants

• Adding more products

• Crossing out identical species on both sides

How can you verify that a redox reaction is balanced?

• By checking the number of molecules

• By ensuring equal charges and balanced atoms on both sides

• By counting the number of electrons

• By checking the number of ions

What is the charge on the bromine species after balancing?

• 1-

• 0

• 2-

• 3-