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Re: [GSAS-Member] Aquatic Plant Stuff & Gregg Watson Ferts
- To: Greater Seattle Aquarium Society member chat <gsas-member@thekrib.com>
- Subject: Re: [GSAS-Member] Aquatic Plant Stuff & Gregg Watson Ferts
- From: Matt Staroscik <matt@wrongcrowd.com>
- Date: Fri, 2 Mar 2007 11:39:02 -0800
- Mail-followup-to: Greater Seattle Aquarium Society member chat <gsas-member@thekrib.com>
- User-agent: Mutt/1.5.12-2006-07-14
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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