Multiple ChoiceOn the pH scale, a change of 1 pH unit corresponds to a tenfold change in 10−pH. How many times more acidic (in terms of H+ concentration) is a solution with pH 6 than a solution with pH 9?4views
Multiple ChoiceTypical human stomach acid has a pH around 1–2. Approximately what is the hydronium ion concentration, [H3O+], for a pH of 1.5?12views
Multiple ChoiceOn-the-scalp hair lighteners are formulated to be alkaline to open the hair cuticle and promote oxidation. Which pH range best describes most on-the-scalp lighteners?4views
Multiple ChoiceAmmonium thioglycolate (often used in hair relaxers) is basic. Which pH range best matches ammonium thioglycolate relaxers?6views
Multiple ChoiceOn the pH scale for aqueous solutions, what is the smallest possible pH value (theoretical, not limited by practical measurement)?6views