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For questions related to the solubility of compounds in various solvents, especially in water. Do not confuse with [solutions] or [aqueous-solution].

3
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Hot oxidizing acids, such as nitric acid od sulfuric acid, are the more canonical methods to separate gold from less rare metals. My solution I assume contains a large amount of silver. …
answered Jan 6 '15 by Klaus-Dieter Warzecha
1
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Keep it as simple as possible :) If both initial solutions are not saturated and all the $\ce{NaCl}$ is dissolved, this will not change upon mixing. If in doubt with the result of a calculation, hav …
answered Mar 11 '14 by Klaus-Dieter Warzecha
2
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The addition of ammonium tartrate turns lead tartrate into a water-soluble tartrato complex: \[\ce{Pb(tart) + tart^{2-} <=>> [Pb(tart)2]^2-}\]
answered Apr 28 '15 by Klaus-Dieter Warzecha
2
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The problem gives that the solubility of Silver dichromate is $\mathrm{8.3\cdot10^{-3} g/100\,mL}$. […] I changed the $8.3\cdot10^{-3}$ from g/mL to mol/L and got $1.9\cdot10^{-8 … }$. […] Were am I going wrong here? Was the solubility given in $\mathrm{g/100\,mL}$? $$\mathrm{8.3\cdot10^{-3} g/100\,mL = 8.3\cdot10^{-2}\,g/L = \frac{8.3}{431.72}\,mol/L = 1.92\cdot10^{-4}\,mol/L}$$ …
answered Mar 26 '15 by Klaus-Dieter Warzecha
3
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Let me add to the confusion: https://books.google.de/books?id=imBzjH6SHi8C&pg=PA303&lpg=PA303&dq=solubility+product+constant+aluminum+hydroxide&source=bl&ots=jXoPiVihnF&sig … =eSK8saszXshTXVEKGOlThUiKVr0&hl=de&sa=X&ei=Xl5TVcepDuj_ywOXmYDQBA&ved=0CG8Q6AEwCTgK#v=onepage&q=solubility%20product%20constant%20aluminum%20hydroxide&f=false $2\times10^{-32}$ http://faculty.ncc.edu/LinkClick.aspx …
answered May 13 '15 by Klaus-Dieter Warzecha
0
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Is anyone able to spot my error? I think so. There is a systematic error in your equations when it comes to stoichiometric factors. What is the solubility product constant $\mathrm{K_{sp}}$ for the reaction $$\ce{A_nB_m(s) <=> nA(aq) + mB(aq)}$$ …
answered Nov 14 '16 by Klaus-Dieter Warzecha
5
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From the abstract of Solubility of Polymers and Copolymers in Supercritical $\ce{CO2}$ […] data to temperatures of 270 °C and 3000 bar […] Over the same range of conditions, $\ce{CO2 …
answered Feb 17 '15 by Klaus-Dieter Warzecha
5
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It seems that you understand the concept very well and that this is just a minor confusion about word fairly. If you would characterize the solubility of a compound (solid, liquid, or gas) by words … , rather than by giving the exact solubility in $\pu{mg\cdot mL^{-1}}$, you would probably come up with terms like highly soluble soluble slightly soluble insoluble So, fairly means that the …
answered Mar 11 '17 by Klaus-Dieter Warzecha
4
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DavePhD is right! Your material is an organic compound. In order to be soluble in water, it should have some polar substituents. I'd however exclude carboxylic acids or phenolic $\ce{OH}$ (except ma …
answered Feb 21 '15 by Klaus-Dieter Warzecha
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Is there any relatively simple method to determine the concentration? That depends on your equipment. Having the following at hand would be helpful: a UV/VIS spectrometer mortar and pestle UV-g …
answered Mar 22 '17 by Klaus-Dieter Warzecha
2
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If one were to change the bulk composition of the mixture by removing some of the solution [...] This does not change the composition of the solution above the solid. Since the concentration of t …
answered Apr 2 '14 by Klaus-Dieter Warzecha
4
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Would adding some organic phase like petrol ether or a non-soluble solid such as ceramic pellets do the same? No. But adding other organic solvents which are miscible with water would. The idea …
answered Mar 24 '15 by Klaus-Dieter Warzecha
4
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You have already concluded that the bubbles indicate that hydrogen gas is formed. Let's assume that two protons are reduced. Each receives an electron and they form a molecule of $\ce{H2}$: $$\ce{2H+ …
answered Feb 20 '16 by Klaus-Dieter Warzecha
2
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The diazo dye (1), known as Solvent Yellow 124 or Somalia Yellow is soluble in aliphatic hydrocarbons. In the European Community, it is used to mark low-taxed diesel fuel (for heating purposes). In or …
answered Mar 12 '14 by Klaus-Dieter Warzecha
2
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I had dissolved some polycaprolactone in that universal thinner above, and it seemed to dissolve quicker than in either toluene or xylene alone. Some of these universal thinners do contain a lot …
answered Apr 15 '15 by Klaus-Dieter Warzecha

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