🤓 Based on our data, we think this question is relevant for Professor Claridge & Ramachandran's class at PURDUE.
Morphine is a weak base. A 0.150 M solution of morphine has a pH of 10.5.
What is Kb for morphine?
We are being asked to calculate the Kb for a 0.150 M solution of morphine (C17H19NO3)
Morphine (C17H19NO3) is a neutral amine, therefore we know that it is a weak base.
Since we’re dealing with a weak base and Kb is an equilibrium expression, we will have to create an ICE chart to determine the equilibrium concentration of each species:
• C17H19NO3 → weak base → proton acceptor
• H2O → will act as the weak acid → proton donor
Equilibrium reaction: C17H19NO3(aq) + H2O(l) ⇌ C17H19NO3H+(aq) + OH-(aq)