Good morning! Had the meh sleep but it's sleep. Still, feeling the *argh* about life in general. Mom was at cardiac rehab yesterday and after she got off the bike, her pulse dropped, per expectations. Then her BP did, too. Oh... shit. And I need to call about the deed for the burial plot just to be prepared, make sure I have it and all in hand. *sigh*
Thus my life. I have no holiday spirit.
Warning: Please check those packets of desiccant that come in pills and other things. Some are silica, and harmless. Others are calcium oxide (particularly if your product was Made In China). Pure calcium oxide is known as quicklime, and is *very reactive with water*. Even sweat on your skin. Please read the packets. CaO = bad news. Quicklime, btw, in water can cause a severe exothermic reaction --- as in, enough to boil the water. It's currently a trend to drop the stuff in bottles of water, cap it, and run. Nobody has yet outrun the power of exothermic chemical reaction. So do *not* dump CaO down a drain. Wrap in kitchen foil (aluminum foil typically) and into the trash. That way, if it is wetted, it's minimized, and *never* open the little paper packets, okay? Okay. Nerd out.
Garden lime, btw, is hydrated quicklime, that is, they pulverize pure CaO (it's in big blocks until then) in a kiln, with water. Even "pure" quicklime is about 1% water, btw, but garden lime (or hydrated lime) is usually much higher in stabilizing content, that is, stuff that can't react too badly. And is also shit on your skin, btw, but not as bad as quicklime, which can lead to a quick chemical burn on sweaty skin.
Most lime is made from, duh, limestone, which is just calcium carbonate, but it occufrs in nature when coal seams are burned out (as in Centralia, Pennsylvania's long-running enviro-disaster underground) and due to volcanic exposure, that is, the volcano's heat hits limestone and converts it in part or in whole to calcium oxide.
Now what the falafel is the difference?
Carbon burns off. Leaving... Calcium and oxide (like iron oxide is rust, think of it that way). So most limes you buy commerically are refined *enough* but still have some percentage of calcium carbonate and similar to keep them from being super-hyper-reactive.
Highly refined lime and quicklime are used in manufacturing of some metals, some plastics, and in treating wastewater. No, it doesn't dissolve anything. (Unless you're an idiot and sit in a bathtub full of water naked and sit still while someone dumps a pound of quicklime into it? You're fine. Well, you're an idiot, but if you're alive, you're jumping out damn quick and surviving the experience.) What it does do is impede bacterial growth, which impedes odor.
In ancient and medieval times, the belief that bad air caused sickness led to the use of lime and quicklime in burials. Nope, doesn't eat the bodies faster (sorry, CSI, you're so freaking wrong it's not even funny). It inhibits decay. Ergo, less stink. Still used in mass burials today, incidentally. However, since lime was always found in graves, someone put two and two together and got seven. *eyeroll* And apparently flunked high school chemistry, or at least didn't have my chem teacher. After that guy, college chem was kinda like, "Oh, yeah, this is just Hell 2.0, been here, aced this before".
Now, I do stress, do not add quicklime to water without room, space, and lots of air! Caclium hydroxide = hydrated calcium oxide, ergo that hydro there, but getting it pure enough for white wash and similar old-time purposes was less demanding that today's modern actual quicklime. Desiccates the hell outta things. And even if it's been partially slaked by this exposure (slake = hydrated, sorry, Gramps worked in a limestone quarry for a few years during the Depression) to wet things? It is still dangerously reactive.
Intersting note: Check your garden lime. If it's high in magnesium, you been done cheated. That's crap stone they used to make that lime. Of course, your garden lime may just be powdered limestone--- that is, *chalk*, e.g., the WHite Cliffs of Dover. Yep.
So the short version is: Calcium carbonate, safe and stable, good. Calcium hydroxide, stable but don't get it on you. Calcium oxide, handle with extreme care, please.
Ah, shit that was not meant to be the whoel freaking check in. Sorry.
Side note: Carbon burns. This is a fact. Coal = carbon. In fact, if we ever figure out how to ignite a diamond? The energy release from the breaking of its intensely strong bonds between its carbon atoms is gonna be fantastic. Sadly, the energy gained won't be as much as the energy required. Pure freaking carbon. Yet diamond dust can float around in space just fine. Coal dust, not so much. Go figure, right?
It's all about bonds, folks. Weak, strong, single, double, et cetera. If you can break a bond easily, pfft, low energy, high reactivity. Break it with difficulty, and it's taking high energy and is probably low reactivity. Thus is carbon dubbed, rightly so by Mr. Jon Stewart, the "slut" of th eperiodic table. It loves bonds. It'll grab damn near anything. It just can't resist. Other elements are also highly slutty, so to speak, but carbon's the one our planet has in abundance.
Oh,a nd if you want good absorption in your body of calcium for nutrition? Please use calcium *citrate*. Carbonate is cheaper, and citrate can be tougher on tummies (acidity), but ou get better absorption. And *never* rely on dark leafy greens, please. Oxalates in those bind the calcium so effectively that you can end up with spiky little kidney stones, and not strong bones. Kale is great for you but not for your *bones*. In fact, eating too many high oxalate foods can give you those nasty kidney stones or other issues with kidney stones, so you do not have to down spinach like Popeye!
I have got to stop being anerd. Right. And someday I'll stop attracting cats,t oo.
Peace on your day.
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