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Re: [GSAS-Member] Aquatic Plant Stuff & Gregg Watson Ferts



As a chemist, by schooling if not profession, I thank you for posting 
and saving me the time. :)

- Matt

On Fri, Mar 02, 2007 at 09:34:28AM -0800, Sanford, Dave   LHS-STAFF wrote:
> In the formula MgSO4 . 7 H2O, the 7 H2O refers to actual molecules of water
> bound to each formula unit of MgSO4. These compounds are called hydrates.
> The crystals look and feel dry but the water is locked into the crystal. If
> you heat a measured quantity of hydrate and then mass the anhydrate, it will
> have a lower mass because the "water of crystallization is driven off.  As a
> chemistry teacher I couldn't resist.
> dave
> 
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-- 
Matt Staroscik
matt@wrongcrowd.com | http://wrongcrowd.com
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