The Vespiary

The Hive => Newbee Forum => Topic started by: El_Zorro on December 23, 2002, 11:18:00 PM

Title: figuring w/vol %?
Post by: El_Zorro on December 23, 2002, 11:18:00 PM

How would a bee figure the molar amount of a HCl solution if the given amount is 37% w/vol?  And another thing, does anybody have the density of a 35% formaldehyde solution?

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It is seductive, way too seductive.             -Eleusis

Title: My understanding
Post by: Mountain_Girl on December 24, 2002, 12:52:00 AM

Hmm, 37% w/vol to me implies: 0.37 g HCl/ml of soln

If 0.37 g HCl = 0.37 g/36.46 g/mol = 0.0101 mols HCl

then the molar conc. of the soln is: 0.0101 mols/ml

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Mountain Boy

Title: Molarity means moles per litre if i remember ...
Post by: raffike on December 24, 2002, 09:16:00 AM

Molarity means moles per litre if i remember correct.You can do calculations yourself.

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For those about to synth,we salute you

Title: 37% w/w formaldehyde in water, d=1.090
Post by: seelite on December 24, 2002, 05:04:00 PM

37% w/w formaldehyde in water, d=1.090

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Don't drug the mind-let the mind use the drug-it won't mind.