worksheet questions

• reduction or oxidation (oxygen) 


  gained = oxidation

  loss = reduction

  tip: when the oxygen is by itself on product side its a loss
• reduction or oxidation (hydrogen)


  gain = oxidation

  loss = reduction

  tip: when the hydrogen is by itself on product side it’s a loss
• reduction or oxidation or both (electrons) charges


  loss = oxidation

  gain = reduction

  both = redox reaction

  tip: losing electrons means gaining proton, losing electrons causes oxidation, gaining electrons causes reduction

  -losing e- = positive
• deciding which perspectives to take based on oxidation/reduction:

  when deciding between hydrogen and oxygen pick the one that CHANGES between the reactant side and the product side
• what are benefits and drawbacks of hydrogen fuel cells?


  pros: reliable, produces few pollutants when operated, hydrogen can be produced by splitting (electrolysis) or from hydrocarbons in fossil fuels

  cons: explosions/flammability hazard, low availability of hydrogen supply infrastructure, low market availability