Exam 11: Oxidations and Reductions Charge the World

The following set of redox reactions takes place as shown. If you had two containers filled with the ion solution described above with a wire connecting a piece of iron (in container A)and a piece of copper (in container B)and a salt-bridge connecting the two containers, describe what happens.

What is one of the drawbacks to using fuel cells?

Which of the following statements best describes a cathode?

What is a reduction?

Which of the following species is the oxidizing agent? 2 CuBr → 2Cu + Br₂

For each of the following unbalanced equations, which is depicted: oxidation or reduction? a)Cr → b) Sn →

In a battery, the following two oxidation-reduction reactions are taking place: rxn A: Zn → Zn²⁺ + 2e^- Rxn B: 2 NH₄⁺ + 2e^- → 2 NH₃ + H₂ Which reaction is taking place at the cathode?

How would connecting iron with a wire to a piece of metal like copper, which undergoes reduction very easily, affect the rate at which the iron corrodes?

In a battery, the following oxidation-reduction reactions are taking place: Mn₂O₃ + ZnO → 2 MnO₂ + Zn What is undergoing an oxidation as written?

How is electrolysis different from what is going on chemically inside a battery?

Why is recycling of aluminum better for the environment than electrolysis of bauxite (an aluminum ore)?

How might electrolysis be used to raise the hull of a sunken ship?

In the oxidation-reduction reaction Mg(s)+ (aq)→ (aq)+ Cu(s), which atom or ion is reduced? Which atom or ion is oxidized?

Why is the anode of a battery indicated with a negative (-)sign?

In a battery, the following oxidation-reduction reactions are taking place: Mn₂O₃ + ZnO → 2 MnO₂ + Zn What is being formed at the anode?

Which of the following metals would be the hardest to reduce to its native form from an ore?

Upon ingestion, grain alcohol, O, is metabolized into acetaldehyde, O, which is a toxic substance causing headaches as well as joint pains typical of a "hangover." Is the grain alcohol oxidized or reduced as it transforms into acetaldehyde?

A major source of chlorine gas, , is from the electrolysis of brine, which is concentrated salt water, What is the sign of the electrode where the chlorine gas is formed? Is it negative or positive?

During combustion, the oxygen atoms of oxygen molecules ________.

The following set of redox reactions takes place as shown. If you had two containers filled with the ion solution described above with only a wire connecting a piece of iron (in container A)and a piece of copper (in container B), which way do the electrons flow?