The van'tHoff factor of a 0.044 M aqueous solution of magnesium sulphate is 1.3. What is the freezing point of the solution if K_f = 1.86 degrees C/m? Why are molecules with double bonds more stable? If someone drank a slightly salty saline solution, what ...
The particles quickly swell and absorb water, urine, or other aqueous solutions. Polyacrylic acid is a polyelectrolyte which is soluble in aqueous media at neutral pH, due to the ionization of the pendent carboxyl side chains. Carbopols are polymers of acrylic acid that have been cross-linked ...
The separation was performed in a gradient elution mode composed by 1% formic aqueous solution (A) and acetonitrile (B). The flow rate was 1.0 mL min−1, and the injection volume 10 μL. The gradient program [time (min), %B] was: (0.00, 5), (5.00, 5), (10.00, 30), (15.00...
The residue was treated with aqueous 0.5 N HCl (10 mL) and the mixture was extracted with methylene chloride (3 × 15 mL). The combined extracts were washed with sodium bicarbonate (1 × 2 mL) and brine (2 × 2 mL), dried over magnesium sulfate, and concentrated under reduced pressure...
When the storm comes, the debris and solid particles from the commercial or residential areas can be washed away into the streams. Due to the large amount of pavement in cities, there is an increase in infiltration and increase in velocity. The natural settling areas are removed. ...
The dotted and dashed blue lines depict the particle mass concentrations calculated by the Mn-catalytic aqueous phase reaction with and without considering the ionic strength effect. The initial conditions were the same as those of the solid blue circles. b Dependence of sulfate formation rate (r)...
The synthesis of Bis-(sodium sulfopropyl)-disulfide containing SS bond using sodium sulfide nonahydrate and 1,3-propane sultone as raw materials is divided into two steps: the reaction of sodium sulfide nonahydrate with sulfur to form an aqueous solution of sodium disulfide, and ethanol as the ...
and cautiously quenched with aqueous sodium hydroxide (1 N,178 mL). The contents were stirred for 3 h, THF was removed under vacuum, the resultingaqueous suspension was cooled to 0 °C, and the product was filtered off. After drying, theproduct was obtained as a white solid: 7.78 g (...
and medicine. Its synthesis involves the reaction of sodium sulfide nonahydrate with sulfur to form an aqueous solution of sodium disulfide. Subsequently, the solution reacts with 1,3-propane sultone in ethanol as the solvent, resulting in the formation of Bis-(sodium sulfopropyl)-disulfide containi...
All aqueous simulations were done at the isothermal-isobaric ensemble (T = 300 K and P = 1 atm) using a Berendsen thermostat and barostat54. The SHAKE algo- rithm55 was used to constrain all bond distances to their equilibrium value, allowing a 2-fs integration time ...