EDIT: I did the titration. I utilised 500ml of my inventory solution HCl, and titrated in opposition to my stock solution of NaOH. HCl is 0.001M and NaOH is 5M. More mature teks call for acidifying down to pH 1, but there is really no need to go reduced than four-5. Even neutral water that hasn't been acidified would still be comparatively succe