Multiple ChoiceHair, skin, and nails are generally considered to be slightly acidic. Which pH range best describes their typical surface pH?1views
Multiple ChoiceOn the pH scale, what is the typical average pH range for healthy human skin and hair?2views
Multiple ChoiceEarly hair-relaxer (lye) products were strongly basic. Which pH range best matches these early relaxer formulations?1views
Multiple ChoiceOn the pH scale, pH is a measurement of the concentration of what species in aqueous solution?2views