Multiple ChoiceOn the pH scale for aqueous solutions, what is the smallest possible pH value (theoretical, not limited by practical measurement)?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, healthy human skin and hair are typically considered slightly acidic. Which pH range best matches this condition?1views