a. Calculate the amount (mmoles) of excess HCl that was back-titrated with NaOH b. Calculate the total mmolr HCl in the acid trap c. Calculate the mmoles NH3 that was liberated from the sample d. Calculate the mmoles neohetramine present in the tablet e. Calculate the mass (mg) of neoheteramine present in the tablet

Sample Problem 4 . Neohetramine (C16H210N4, M.M. = 285.37) is a new antihistamine that is used to treat allergies. An over the counter (OTC) tablet was pulverized and analyzed by the Kjeldahl method. The liberated NH3 was collected in 50.00 mL of 0.01240 M HCl. The excess acid was back- titrated with 12.00 mL of 0.01000 M NaOH