Hello all, I am a high school science teacher living in Morocco and I want to start making my own soap. Here we have lots of different ingredients on hand cheaper than most and the commercial products tend to be really pricey by comparison, so that and the fact that most soap irritates my skin makes me think making my own would be better. I was researching the chemical reaction and don't know where to get reliable SAP values for using NaOH, also I kept finding recipes mentioning different concentrations of NaOH used (between 9 and 10.5 M?) is there a molarity usually used? Also how will I know the final pH of my soap? I understand it is hard to know exactly what percent of oils in your mix will be saponified but I don't like the guess work and most places' math does not add up. I don't want a dangerous product.