Lesson Worksheet: Batteries and Fuel Cells Chemistry

In this worksheet, we will practice describing and comparing the production of electrical energy from batteries and fuel cells.

Q1:

Researchers compared two cars, one powered by lithium-ion cells and the other powered by hydrogen fuel cells, and summarized their findings. Which of the following is a reason why hydrogen fuel cells may be considered superior to lithium-ion cells?

  • AHydrogen fuel cells use hydrogen, which is difficult to store.
  • BHydrogen fuel cells use hydrogen, which can be flammable.
  • CHydrogen fuel cells have a greater range than lithium-ion cells.
  • DHydrogen fuel cells cause the car to be more expensive than the car powered by a lithium-ion cell.
  • EHydrogen fuel cells are more expensive to refuel than lithium-ion cells.

Q2:

Researchers compared two cars, one powered by lithium-ion cells and the other powered by hydrogen fuel cells, and summarized their findings. Which of the following is a reason why lithium-ion cells may be considered superior to hydrogen fuel cells?

  • ALithium-ion cells may release toxic chemicals when they are disposed of.
  • BLithium-ion cells take longer to recharge than hydrogen fuel cells take to refuel.
  • CLithium-ion cells have a lifespan and eventually cannot be recharged.
  • DLithium-ion cells may catch fire during use.
  • ELithium-ion cells are easier to store in cars than hydrogen fuel cells.

Q3:

The following diagram shows a simple cell.

Which of the electrodes would go into the solution as positive ions and why is this the case?

  • ASilver, because it is more reactive and loses electrons more easily
  • BSilver, because it reacts more vigorously with dilute sulfuric acid
  • CZinc, because it is less reactive and loses electrons more easily
  • DZinc, because it is more reactive and loses electrons more easily
  • EZinc, because it is less reactive and gains electrons more easily

Q4:

In the following simple cell, what would you observe at the silver electrode?

  • AThe electrode getting smaller
  • BBubbles of gas being produced
  • CCrystals of metal falling to the bottom of the beaker
  • DA metal coating appearing on the surface of the electrode
  • EThe solution turning blue near to the surface of the electrode

Q5:

The voltage in the following electrochemical cell reads +0.34 V. What will the voltage read if the two electrodes are reversed?

Q6:

In the hydrogen fuel cell, which of the following statements is correct?

  • AThe reaction between hydrogen and oxygen is endothermic.
  • BChemical energy is converted into electrical energy.
  • CWater and carbon dioxide are produced.
  • DHydrogen is reduced in the reaction.
  • EPetrol is one of the reactants.

Q7:

Which of the following equations shows the overall reaction that occurs in a hydrogen fuel cell?

  • A2HO2H+O222
  • BO+4H+4e2HO2+2
  • CH2H+2e2+
  • DH+2OH2HO+2e22
  • E2H+O2HO222

Q8:

Which way do the electrons travel in a simple electrochemical cell, such as the one in the diagram?

  • AThe electrons travel from the more reactive electrode to the less reactive electrode through the electrolyte.
  • BThe electrons travel from the less reactive electrode to the more reactive electrode through the electrolyte.
  • CThe electrons travel from the less reactive electrode to the more reactive electrode through the voltmeter.
  • DThe electrons travel from the more reactive electrode to the less reactive electrode through the voltmeter.

Q9:

Which combination of electrodes and an electrolyte would cause a voltage to register in this electrochemical cell?

  • AA: Iron electrode
    B: Tin electrode
    C: Water (HO2) electrolyte
  • BA: Tin electrode
    B: Tin electrode
    C: Aqueous sodium chloride electrolyte
  • CA: Iron electrode
    B: Iron electrode
    C: Water (HO2) electrolyte
  • DA: Iron electrode
    B: Tin electrode
    C: Aqueous sodium chloride electrolyte
  • EA: Iron electrode
    B: Iron electrode
    C: Aqueous sodium chloride electrolyte

Q10:

An electrochemical cell is set up using an iron electrode and a lead electrode. The reading on the voltmeter is +0.32 V.

The iron electrode is replaced by an electrode of metal X and the reading on the voltmeter drops to +0.24 V. What does this tell you about metal X?

  • AMetal X is less reactive than iron.
  • BMetal X is more reactive than iron.
  • CMetal X is less reactive than lead.

The iron electrode is replaced by an electrode of metal Y and the reading on the voltmeter increases to +0.68 V. What does this tell you about metal Y?

  • AMetal Y is more reactive than iron.
  • BMetal Y is less reactive than lead.
  • CMetal Y is less reactive than iron.

The iron electrode is replaced by an electrode of metal Z and the reading on the voltmeter decreases to 0.13 V. What does this tell you about metal Z?

  • AMetal Z is less reactive than lead.
  • BMetal Z is more reactive than iron.
  • CMetal Z is more reactive than lead.

This lesson includes 1 additional question for subscribers.

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