Codeine, C18H2N, is an opioid drug used to treat pain and diarrhea. It is also used as a cough suppresent. Codeine is a weak base with pKb-6.05. Codeine is frequently administered in the form of its more soluble hydrochloride salt, codeine hydrochloride (C18H213 Calculate the pH of a 0.250M solution of codeine hydrochloride. [Refer to page 204 in the lecture note manual for a similar problem or watch the Tutorial Video on Moodle for the calculation of the pH of a solution of a drug salt] Report your answer to two decimal places.