A solid KCl is more soluble in water than in methanol (CH3OH). True or false? Solubility of Salts: Chemical salts, when stirred in a beaker of water, may either remain undissolved at the bottom, or may dissociate into ions and disappear to form a transparent solution. ...
Why does sugar dissolve but not dissociate in water even though it is a polar molecule? Why is an acid catalyst used in the reaction between benzoic acid and methanol? Explain the buffer system used in buffered aspirin. For example, what is the chemical formula of the buffer that is used?
pcsaft import SPC_SAFT, PCP_SAFT spcs = SPC_SAFT('NC6,NC12') # Simplified PC-SAFT pcps = PCP_SAFT('H2O,MEOH') # Polar PC-SAFT The cubic equations of state are found in the cubic module. Available cubic EoS's and more information on the individual cubics, mixing rules, etc. can...
Interestingly, although R2 and β-piceid showed the same retention time, R2 showed higher water solubility than β-piceid. In the UPLC analysis using the C18 column, R1 had a shorter retention time than R2 and β-piceid, suggesting that the former is more polar than the latter. However, ...
These are much weaker than the chemical bonds but are essential in determining the overall property of the compound. For instance, the fact that water has a higher boiling point than methanol even though methanol has a higher molar mass is explained by the IMFA present....
preserve the critical initial protein precipitation achieved with the commonly used 40% acetonitrile, 40% methanol, and 20% water (AMW20)29,30,31,32,33,34,35,36,37,38 extraction approach, which, when followed with a secondary water addition, would improve the solubility of polar metabolites ...
Samples in both vials were dried down completely on a Vacufuge plus (Eppendorf) and resuspended in a solution of 50% acetonitrile and 50% water for HILIC and a solution of 80% water and 20% HPLC-grade methanol for RPLC. A Thermo Scientific Vanquish Duo ultra-high performance liquid ...
Briefly, 1.9 ml of solvent mixture, 2:1 methanol:chloroform v:v, was added to 0.5 ml sample. Samples were vortexed for 30 s, and then 0.625 ml of chloroform was added. Samples were vortexed again (for 30 s), and 0.625 ml of water was then added. Samples were vortexed for 30 s ...
Thin-layer chromatography (TLC) was employed to separate lipids on a silica gel TLC plate (Merck, Whitehouse Station, NJ, USA) developed with the mobile phase of hexane/tert-butyl methyl ether/acetic acid (80/20/2, by volume) or of chloroform/methanol/acetic acid/water (25/4/0.7/0.3,...
In the urine, more than 82% of the product was water soluble, 17% was 6′,7′-dihydro-6′,7′-dihydroxyrotenone, and only 1% was unchanged rotenone. In the liver and small intestine, 6′,7′-dihydro-6′,7′-dihydroxyrotenone was the predominant metabolite. However, water-soluble ...