unknown002

Hey people, i just joined this forum, this is quite a fascinating site! Ok, back to sulfuric acid. I heated acid from battery until it starts smell ( SO3 came out, right?), i tried it on some tissue and did not burn it (guess around 90%~), so i used some chunks of anhydrous magnesium sulfate in a liebig distiller which sits on top of a small flask with the acid and starts to heating it, hoped to extract the water so i dont lose the SO3. it didnt work out well, so i just did a test batch and added anhydrous magnesium sulfate directly to the acid. it did fuzzed a bit and i think its the water crystallisation of mgso4... So now i ended up around 96%~ acid since it slightly burns tissue when cooled down. But how do i separate the MgSO4.7H2O?? Do i distill the mixture to like 330~C and bubble it through another batch of 90% acid? or is there otherways. Thanks:confused: