ou were instructed to rinse the filter pipettes with methanol and with hexane. Obviously thereason for this is to remove any contaminants that may be present on the glass or cotton. Usingwhat you learned about the physical properties of organic compounds in 40A, why were thesolvents methanol and hexane chosen

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Jayce Juarez

Chemistry

15 September, 13:23

ou were instructed to rinse the filter pipettes with methanol and with hexane. Obviously thereason for this is to remove any contaminants that may be present on the glass or cotton. Usingwhat you learned about the physical properties of organic compounds in 40A, why were thesolvents methanol and hexane chosen

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Dorian Carter · Answer 1

Methanol being a polar organic solvent, can dissolve polar contaminants whereas hexane being a non polar solvent can dissolve non polar contaminants.

So, if they are used together, we can dissolve most of the contaminants to wash out the glass. Moreover, both these solvents have relatively high vapor pressure at room temperature and pressure than most other solvents. Therefore, residues evaporate rather more quickly.