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Title: Fractional Distillation % composition calculations Organic Chemistry LAB Post by: Jessc on Feb 24, 2017 Here's the formula I am given......
Fraction 1: weight: X GC ratio: A hex : A hep Fraction 2: weight Y GC ratio: B hex : B hep Fraction 3: weight: Z GC ratio: C hex : C hep Ahex = area hexane/ area hexane + area heptane Ahep = area heptane/area hexane + area heptane Solve for weight of hexane: Mass hexane = A hex * X + B hex * Y + C hex * Z Mass heptane = A hep * X + B hex * Y + C hex * Z Solve for % hexane and % heptane: %hexane = mass hexane / mass hexane + mass heptane % heptane = mass heptane / mass hexane + mass heptane My weights are, Fraction 1 is 4.47g, Fraction 2 is 4.7g, and Fraction 3 is 4.24g and I have no idea how to set this problem up even with the formulas given :'( Also I am not sure what GC ratio means but I have percent composition estimated from a graph and found that to be 52% hexane and 48% heptane, if that is GC ratio or not I don't know Title: Re: Fractional Distillation % composition calculations Organic Chemistry LAB Post by: bio_man on Apr 1, 2017 Did you ever end up answered any of these?
Could you update the community with the answers? Title: Re: Fractional Distillation % composition calculations Organic Chemistry LAB Post by: Jessc on Apr 6, 2017 I was missing information so unable to solve this problem.
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