Reaction Kinetics

1
Reaction Kinetics

• -the study of reaction rates in a chemical
  reaction
• -the rate is how fast a reaction occurs
• -sometimes we want reactions to be fast
  (synthesizing a product to be sold, food cooking)
  while other times we want them to be slow (food
  rotting, metal sheds corroding)
• -not all spontaneous reactions are fast ie
  C(graphite) ? C(diamond)
• -expressing rates Ratechange in a given
  quantity specific time
• -Examples of amounts which can be monitored or
  varied
• colour of solution temperature
• pressure mass
• concentration of solution conductivity
• pH moles

2

• -You need to make sure you check units on all
  questions
• -Sometimes you will be asked to use stoichiometry
  (the mole ratio from the balanced chemical
  reaction) to convert into a rate with different
  units.
• -You need to be able to identify possible
  properties that could be monitored in order to
  determine the rate of a reaction.
• Example Cu(s) 2HCl(aq) ? CuCl2(aq)
  H2(g)

3

• If the system were closed, could monitor the gas
  pressure and the rate could be in kPa H2 / min
• If you used downward displacement of water,
  could monitor the volume of hydrogen produced and
  the rate would be in mL H2 /min.
• If the rate was determined to be 2.6 x 102 mL
  H2/min, what would it be in grams Cu/s?
• Do w/s Reaction Kinetics 1 answers in green
  binder on front desk
• See Hebden p1-5
• Do Hebden 2, 4-9 answers in the back of book