StarOceanHouse
Bluelight Crew
Alright guys so I'm kind of stumped. I feel like my calculations are right but the amounts seem too small to be measured in a volumetric pipet. So I need to make a 1 ppm solution of cumene with pentane as the solvent in a 5 ml volumetric flask.
cumene density = 0.862 g/ml
pentane density = 0.626 g/ml
1 ppm = 1 mg of solute per 1000 g of solvent. Since it is done in a 5 ml vol flask, 3.13 g of cumene will be the amount of solvent. So, 3.13 g x 1 mg / 1000 g = 0.00313 mg of solute needed. So 3.13^-6 g / 0.862 g/ml = 3.63 x 10^-6 ml which is 3.63 nl. We don't have volumetric pipets that go that low, so there must be some error in my calculations.
cumene density = 0.862 g/ml
pentane density = 0.626 g/ml
1 ppm = 1 mg of solute per 1000 g of solvent. Since it is done in a 5 ml vol flask, 3.13 g of cumene will be the amount of solvent. So, 3.13 g x 1 mg / 1000 g = 0.00313 mg of solute needed. So 3.13^-6 g / 0.862 g/ml = 3.63 x 10^-6 ml which is 3.63 nl. We don't have volumetric pipets that go that low, so there must be some error in my calculations.
