caffeine (C8H10N4O2) pill are mixture and we will be separating caffeine from them. Determine the moles...

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??

Solutions

Expert Solution

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%

queen_honey_blossom answered 1 year ago

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