EDIT: I did the titration. I employed 500ml of my inventory solution HCl, and titrated towards my inventory solution of NaOH. HCl is 0.001M and NaOH is 5M.Saturating the alkaline h2o with NaCl(table salt) can help to interrupt the emulsion; the saltier the water is, the much less satisfied the naphtha is currently being trapped in there. You'll lik