Papaverine hydrochloride (abbreviated papH+Cl–; molar mass = 378.85 g/ mol) is a drug that belongs to a group of medicines called vasodilators, which cause blood vessels to expand, thereby increasing blood flow. This drug is the conjugate acid of the weak base papaverine (abbreviated pap; Kb = 8.33 × 10-9 at 35.0oC). Calculate the pH of a 30.0 mg/mL aqueous dose of papH+Cl– prepared at 35.0oC. (Kw at 35.0oC is 2.1 × 10-14.)
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