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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].

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
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
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
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
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
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
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, $\ce{CO2 … answered Feb 17 '15 by Klaus-Dieter Warzecha It seems that you understand the concept very well and that this is just a minor confusion about word fairly. If you would characterize the solubility of a compound (solid, liquid, or gas) by words … , rather than by giving the exact solubility in$\pu{mg\cdot mL^{-1}}$, you would probably come up with terms like highly soluble soluble slightly soluble insoluble So, fairly means that the … answered Mar 11 '17 by Klaus-Dieter Warzecha DavePhD is right! Your material is an organic compound. In order to be soluble in water, it should have some polar substituents. I'd however exclude carboxylic acids or phenolic$\ce{OH}$(except ma … answered Feb 21 '15 by Klaus-Dieter Warzecha Is there any relatively simple method to determine the concentration? That depends on your equipment. Having the following at hand would be helpful: a UV/VIS spectrometer mortar and pestle UV-g … answered Mar 22 '17 by Klaus-Dieter Warzecha If one were to change the bulk composition of the mixture by removing some of the solution [...] This does not change the composition of the solution above the solid. Since the concentration of t … answered Apr 2 '14 by Klaus-Dieter Warzecha Would adding some organic phase like petrol ether or a non-soluble solid such as ceramic pellets do the same? No. But adding other organic solvents which are miscible with water would. The idea … answered Mar 24 '15 by Klaus-Dieter Warzecha You have already concluded that the bubbles indicate that hydrogen gas is formed. Let's assume that two protons are reduced. Each receives an electron and they form a molecule of$\ce{H2}$:$\$\ce{2H+ …
answered Feb 20 '16 by Klaus-Dieter Warzecha
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
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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