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Homework Help: Rates of reaction

  1. May 20, 2008 #1
    Experiment to show factors that effect rates of reactions. ie. concentration, catalyst, surface area and tempreture
  2. jcsd
  3. May 20, 2008 #2


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    Be more detailed and specific.
  4. May 20, 2008 #3
    Well for concentration you could fill a few conical flasks with some hydrochloric acid of different concentrations and then add the same amount of 1.0 M solution of sodium thiosulphate to each flask. Place the flasks on white tiles with a red cross on them. Obtain a stopclock. Sodium thiosulphate reacts with hydrochloric acid to form insoluble sulphur that will form a yellow precipitate in the solution. Measure the time taken for the solution to become to cloudy to distinguish the red cross for each one.
    The same approach could be taken for temperature.
    For surface area I suppose you could devise something along the lines of reacting hydrochloric acid with marble chips(sodium carbonate). You could alter the size of the marble chips.
    For catalyst you could devise something along the lines using manganese dioxide as a catalyst to speed up the breakdown of hydrogen peroxide or use glycerine to slow the reaction down.
    Last edited: May 20, 2008
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