What is the pH of a solution prepared by dissolving 7.5g HCl in water to make 375mL of solution?
Convert 7.5 g HCl to mols. moles = grams/molar mass.
Convert moles and volume to molarity. M = mols/L soln.
HCl is a strong acid; i.e., it is ionized 100%; therefore, (H^+) of a solution of HCl = (HCl). Use (HCl) to convert to pH.
pH = -log(H^+).