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chloric1
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Quote: Originally posted by Fantasma4500  | i had some distillation mixture of H2SO4 and CaSO4 standing around
i dumped it into a plastic bottle to be situated next to my toilet, to help remove calcium deposits every now and then
about a year later i found the bottle again
and there was about a fist-sized chunk of crystals in there
i eventually found out it was CaSO4 crystals
https://gyazo.com/74e95b60263131dfad29986ace145977
now what i understand is that i hit a particular H2SO4 concentration in which CaSO4 is soluble in
and upon diluting this further, it precipitated out the CaSO4, very slowly
so there must be maybe 10-20% "sweetspot" with H2SO4/H2O concentration in which CaSO4 is soluble.
so that might work for ya.
i would say maybe 20% or even less is where the CaSO4 dissolve- its only a vague guess |
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I’ve gotten gypsum crystals many times larger than precipitated calcium sulfate from concentrated ammonium nitrate solution. Easily filtered with
coffee filter! Calcium sulfate does have considerable solubility in ammonium salt solutions at room temperature. But a nice trick is that calcium
sulfate solubility is diminished by higher temperatures as well as increasing ammonium salt concentration. So if you make ammonium nitrate or
chloride by double displacement with calcium sulfate as the precipitated solid, know that boiling down ammonium salt filtrate with a couple gravity
filtrations will reduce dissolved calcium sulfate to less than 1% concentration before you get a salt cake.
Fellow molecular manipulator
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Random
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There was this procedure, was it inside Wagner Chemical Technology book from 1800s
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Something regarding Sulfuric acid or Nitric acid... or \\\both
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It was a procedure something as if you put all this inside a how we could call it vessel and let it burn or what was it...
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I cannot recall it from my head currently.
Also I have seen this reaction how CaSO4 along with SiO2 gives SO3 when heated
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They change this reaction into another with no SO3
Look what Politics is.
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But let me get again how I could say OnTopic.
I could write a lot regarding this topic. But if I only quickly read it, don't use GlassWare then.
You can use another \\\material
Edit:
Metal. Ceramic.
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Edit2:
What about Silver Nitrate and HCl
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[Edited on 30-9-2024 by Random]
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RogueRose
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I found a convenient source for "disposable" glassware is to use old metal halide (HPS/MH) light bulbs (250w - 1500w) which I've found to be made of
borosilicate glass. The 1500w bulbs are 1.5-2.5L in size. I used a Dremel like tool with a diamond cutting disc to cut the glass near the bulb
thread & remove the "guts" of the bulb.
These bulbs are used in industrial applications like large parking lots, warehouses or any other place that needs large areas lighted. I found tons
of these (and the transformers) at various second hand building material stores (like Habitat for Humanity Re-Store & some Goodwill's). Many
places are replacing these lights with LED so these stores often have lots of these lights & bulbs.
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Random
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| Quote: Originally posted by RogueRose | I found a convenient source for "disposable" glassware is to use old metal halide (HPS/MH) light bulbs (250w - 1500w) which I've found to be made of
borosilicate glass. The 1500w bulbs are 1.5-2.5L in size. I used a Dremel like tool with a diamond cutting disc to cut the glass near the bulb
thread & remove the "guts" of the bulb.
These bulbs are used in industrial applications like large parking lots, warehouses or any other place that needs large areas lighted. I found tons
of these (and the transformers) at various second hand building material stores (like Habitat for Humanity Re-Store & some Goodwill's). Many
places are replacing these lights with LED so these stores often have lots of these lights & bulbs. |
There are various ideas what could be used as Apparatus.
I have been doing Plumbing before I started attending College and everything concerning dealing with Apparatus became easier for me.
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jackchem2001
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Very interesting, good to know. Could the cracking instead be due to a crust forming with a different coefficient of thermal expansion rather than
direct embrittlement of the glass?
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bnull
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| Quote: | | Could the cracking instead be due to a crust forming with a different coefficient of thermal expansion rather than direct embrittlement of the glass?
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No, it's really embrittlement. I found at least one paper describing the effects of substitution or removal of sodium from glass. If I'm not mistaken,
it was N. J. Kreidl, B. F. Trumm, R. F. Scott, Electrolytical Replacement of Sodium by Ammonium in Glass (https://doi.org/10.1111/j.1151-2916.1941.tb14850.x). From the abstract:
| Quote: | | A review is given of the exchange of ions (1) in glasses containing water, (2) on the hydrated surfaces of ordinary glasses, and (3) in commercial
glasses with and without the application of an electrical field, and it is shown that the ammonium ion offers unique features. It may be
electrolytically introduced into soda glasses without impairing their structure as much as other ions. |
Quod scripsi, scripsi.
B. N. Ull
P.S.: Did you know that we have a Library?
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