How Much Does Filter Paper Weigh

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Yield gone wrong

• Thread starter FaNgS
• Start date Feb 13, 2007

Yield gone wrong!!

How-do-you-do, I just have a question about some applied things in a chemistry lab and errors.
:uhh:
We carried out a recrystallization experiment of benzoic acrid and napthalene :zzz: terminal calendar week and during one of the steps where i was supposed to transfer my pure sample of benzoic acid from a 5mm calibrated examination tube onto a filter paper and dry in an electric oven to weigh the mass obtained and calculate the %yield (all of the appliance used is for macroscale organic chemistry experiments...oh i forgot to mention that this is an organic chemistry experiment, unless its obvious :tongue2: ) i forgot to measure out the mass of the filter paper itself and it seems that the filter papers have quite big differences in mass....my friend recorded a filter paper mass of 0.766g
so at present all i have is the weight of the pure benzoic acid and filter paper which is 0.879g...then i can't find the mass of pure benzoic acid at present since i dont know the weight of the filter paper and hence tin can't summate the yeild.
my question is if there is any method to obtain the mass of my filter paper? is it a practiced idea to measure out the mass of a few filter papers and take the average of them and use that value?

fyi i started with 0.103g of impure benzoic acid :shy:

thanks :)

Answers and Replies

If the weights vary quite a flake y'all could apply some simple statistics (st. dev or something) to give a practiced thought to the reader what range of error you might take. It should still be mentioned in your report/write-upwardly that the filter mass wasn't taken originally and that an average mass of a few filters was substituted.

Last edited: Feb xiii, 2007

remove the benzoic acrid from the dry filter paper and rinse with solvent to completely remove it. Use acetone. dry filter paper and weigh.

Adjacent time write out your lab leaving spaces (underlined) for data you need to collect. I know information technology is a pain, but information technology works. No demand to practice this once you lot become familiar with routine tasks.

thanks for the advice guys :) i'll keep it in heed

chemisttree: remove the benzoic acid from the dry filter paper and rinse with solvent to completely remove it. Use acetone. dry out filter paper and counterbalance.

i'll definately go along that in listen

(sad i dont know how to utilise all the exact functions in here yet)

If you are going to exist washing the filter newspaper with solvent to remove the benzoic acid it would be a good idea to do the aforementioned procedure to a unused filter. This would permit you know if the solvent is extracting anything out of the filter (which shouldn't happen, merely its still a good thing to bank check)

really good signal dmoravec cheers :)

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How Much Does Filter Paper Weigh,

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