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EDIT: I did the titration. I employed 500ml of my stock solution HCl, and titrated in opposition to my stock solution of NaOH. HCl is 0.001M and NaOH is 5M.However really controversial, the foil water bottle trick can get you to God, full disembodied other alien worlds. Not surprisingly a GVG will be far better, but a lot of are not able to afford