When the reaction takes place bubbles of H2 are given off which might stay around the magnesium which therefore reduces the surface area of the
magnesium and so the acid can not react properly with it so this affects the results.
To get more accurate results, we could have heated the acid to a lower temperature to stop a large amount of H Cl being given off. The other main thing that could have helped us to get more accurate results is we cold have swirled the reaction throughout it to stop the diluting of the acid and the bubbles of H2 being given off.
If I had time I could have done the reactions a few more times to get a better set of results. This would have helped my graphs to show better readings.
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