[SOLVED] magnesium and acid rates reactions im producing an investigation in the reaction between magnesium a solid metal, and acids of varying concentration, pH and temperatures. these variables are to produce results for comparison. however i am unsure about what apparatus would be most suitable, for this investigation eg heating acids safely, collecting gas products, timing them, volumes to be recorded. one approach is to record the time taken for a certain amount of H2 gas to be produced in a reaction between Mg and HCl. what would you suggest? any offers welcome.