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    I am doing an Isa on rates of reaction. We are doing a practical to see how long it takes for a ribbon of magnesium to dissolve in different concentrations of hydrochloric acid . Does anyone have any tips for me to get an A* Or just some facts on how to tackle it ?
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    Hi,
    You know the reaction of Mg + HCl.

    The Mg should visibly disappear in a finite length of time.

    Describe an experiment with:

    1. Specific molar concentrations of HCl (show your working from mass number and actual weight of HCl)
    2. A number of pieces of Mg of fixed mass, say 10g.
    3. Any confounding factors ironed out e.g. steady temperature, steady pressure, equal surface area of Mg exposed to HCl, etc.
    4. Repeat the measurements a few times with each concentration of HCl to give an average that would level out human error and provide a significant result..
    5. Description of the presentation of results (table, graph, etc.) and their analysis (mathematical and/or statistical)
    6. How you would interpret the results/expected results and their explanation.
    7. Cite any research papers that report a similar experiment and provide a critical comparison between your experiment and the researcher's.

    Hope this helps.
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    anyone know what will come up in section b isa paper this year
 
 
 
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