In: Chemistry
caffeine (C8H10N4O2) pill are mixture and we will be separating caffeine from them. Determine the moles of caffeine in a 1.75 g pill that is 29.33% by mass caffeine. determine % recovery of caffeine if you were able to isolate 33.6 mg of caffeine from the pill??
mass of caffeine in a pill = 1.75*29.33/100 = 0.513 g
moles of caffeine in a pill = w/mwt
mwt = molarmass of caffeine = 194.2 g/mol
= 0.513/194.2
= 0.00264 mol
percent recovery of caffeine = mass of caffeine recovered / mass of caffeine in pill*100
= 0.0336/0.513*100
= 6.55%