Practical investigations
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How can I investigate whether iron(II) sulphate tablets get significantly oxidised depending on whether the tablets are crushed or whole?
Ulex says
If you crush the tablets in a mortar with dilute sulphuric acid I doubt very much if there will be any oxidation. If you crush them dry and then leave them exposed for varying periods of time, it seems to me likely that there will be oxidation and that therefore the titration values will be lower than before.
I have a suspicion (but it is no more than that) that the tablets contain some glucose which is there to minimise oxidation. I wonder what happens if you do a Benedict’s test.
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Risk assessment
Before attempting any practical work based on the advice and suggestions on this website, you must do the following. Identify any hazards, assess the risks from these hazards, and then decide appropriate control measures to reduce the risks. You must have these approved by those in authority in your school or college laboratory. Do not rely on what is said on this website.
For further guidance see our tutorial on Risk Assessment.
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updated: 28 January 2007
