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Topic: sulphate salts of amines + empirical formulas  (Read 1480 times)

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Offline organika

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sulphate salts of amines + empirical formulas
« on: April 30, 2016, 10:29:12 AM »
Why is (for example) amphetamine sulphate written as 2(C9H13N)·H2SO4 and the phosphate as C9H13N·H3PO4?

Do the brackets in the formula imply that two molecules of amphetamine freebase would be required to produce one molecule of sulphate?
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Offline Arkcon

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Re: sulphate salts of amines + empirical formulas
« Reply #1 on: April 30, 2016, 06:45:53 PM »
Yes.  Can you guess why?  What is it about H2SO4 that gives you a hint?  Wait til you find a molecule that is 2/3 H2O, or 1/2 ethanol.
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Hey, I'm not judging.  I just like to shoot straight.  I'm a man of science.

Offline organika

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Re: sulphate salts of amines + empirical formulas
« Reply #2 on: May 01, 2016, 09:02:38 AM »
Its diprotic. Why then is the phosphate not written as 3(C9H13N)·H3PO4?
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