I want to try and make hydrogen but i am not sure what concentraion of HCl to use and how muchAlso I am not sure how much grams of aluminuim foil to useCan anyone help pls.
For a given dimension, square tubing is the stiffest, but also the heaviestAs for what dimension of tubing, we don't know enough about the design to give a meaningful answerLarger tubing will give more triangulation within its structure, making it stifferMore actual triangulation will negate the need for the large diameter tubing to provide its own structureUnless you have extensive testing facilities, I'd stick with steelHeat treating involves heating up the metal to a certain temperature, and then cooling it off at a specified rateSome heat treatments involve slowly cooling the metal over 12 or more hours, some involve water quenching to cool it almost instantly, others something in betweenThe purpose of heat treating is to align the crystals in the metal matrix, to provide the optimal balance of stiffness and brittlenessDifferent procedures produce different results, so choosing the right treatment for the application is part of the jobIt's IMHO best left to a specialist, who I guess would be referred to as a 'heat treater.' On another note, welding will affect the heat treatment of the metal involved; so most alloys - steel or aluminum - need to be treated after welding, to restore their full strength.
Aluminum foil purchased commercially usually has a coating of oxide on it, so it may take a while for the foil to react with the HClIt doesn't matter too much what concentration of acid you use or how much foil you use, but the reaction is 2Al + 6HCl 2AlCl3 + 3H2So it takes 6 moles of HCl for every 2 moles of Al, but since you don't have pure aluminum, it will be difficult to judgeJust make sure you have more HCl than foil.
