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Calculate purity of borax

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#1 dingdong



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Posted 22 February 2017 - 05:47 PM

Hi, I have a borax sample Na2B4O7.10H2O and I would like to know the purity of this sample. Given that the B2O3 % is 33.55% w/w.

How can I calculate from that? 

I know Molecular weight for B2O3 is 69.6182, Molecular weight for Na2B4O7.10H2O is 381.3721.


Thank you.

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