Redux Reactions Quiz

What does the mnemonic 'oil rig' stand for in the context of redux reactions?

• Oxidation is loss, reduction is gain

• Oxidation is gain, reduction is loss

• Oxidation involves light, reduction involves gravity

• Oxidation is light, reduction is gravity

What is the result when a magnesium atom loses two electrons?

• It becomes a 2- ion

• It becomes a 2+ ion

• It becomes a 1+ ion

• It becomes a neutral atom

In a redux reaction, what happens when magnesium reacts with a dilute acid?

• Hydrogen gains electrons and forms hydrogen ions

• Magnesium gains electrons and forms magnesium ions

• Magnesium loses electrons and forms magnesium ions

• Hydrogen loses electrons and forms hydrogen ions

In redux reactions, why must oxidation and reduction occur simultaneously?

• Because electrons lost by one substance must be gained by another

• Because electrons are neutral

• Because electrons are created

• Because electrons are destroyed

What occurs in a displacement reaction involving calcium and iron sulfate?

• Iron and sulfate form a compound

• Calcium and iron form a compound

• Iron is displaced by calcium

• Calcium is displaced by iron

What are spectator ions in an ionic equation?

• Ions that do not change during the reaction

• Ions that lose electrons

• Ions that participate in the reaction

• Ions that gain electrons

What is the purpose of writing ionic equations?

• To show the color changes in a reaction

• To show the energy changes in a reaction

• To show all particles involved in a reaction

• To show only the particles that change during a reaction

How do you balance charges in a half equation for calcium?

• Add protons to the left side

• Add protons to the right side

• Add electrons to the right side

• Add electrons to the left side

What happens to iron ions in a half equation when they gain electrons?

• They become iron ions with a higher charge

• They become iron atoms

• They remain unchanged

• They become iron ions with a lower charge

How can you verify the correctness of a half equation?

• By checking if the mass is conserved

• By checking if the overall charge is balanced on both sides

• By checking if the color is the same on both sides

• By checking if the number of atoms is equal on both sides