Why is there a faster rate of reaction at low temperatures with magnesium and an acid and vice versa?
• I am doing a Chemistry prac investigating the amount of Fe(II) present in iron tablets. I am investigating this using a titration with potassium permanganate, after adding distilled water and 2M suphuric acid to the ground iron tablet in the titration flask. According to the amount of iron that is given on the bottle, the titre should be about 3 ml. However, I cannot reach an end-point because the permanent pink colour that indicates the end point of the reaction is never reached. No matter how much potassium permanganate I add, the colour fades out (sometimes this takes overnight). The colour still fades out even when titres of 100 and 200 ml are added. I was wondering what may have occurred to cause this unforeseen consequence. Thanks heaps. • I am currently working on my formal report on the quantitative determination of ASA in aspirin tablets using a back titration. Can you tell me what is the rationale behind the dilution and aliquoting of the aspirin sample? Also, what are the
