Solvent

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  • Universal Solvent Physics

    Startling Physics Of The Universal Solvent... " There isn't anything softer and weaker than water, and nonetheless there isn't anything better for assaulting arduous and rugged things." We are all cognizant of the fact that 65% of our bodies and 75% of earth is composed of water and also are familiar to some of its properties yet it stands out to be intensely mysterious. Several of its properties are so strange that even to this day they elude scientific apprehension. • Mpemba Effect: A logical being might presume that hot water would take longer time to drop down to 0 degree centigrade and freeze than the one at room temperature or cold water. Surprisingly, it is observed that hot water freezes faster than a cold water when subjected to same subzero environment. No one knows why.…

    Words: 1137 - Pages: 5
  • Separation Of Xylene Essay

    process is disclosed for separating low molecular weight alcohols, especially ethanol, from aqueous mixtures  The feed mixture contains alcohol and water with an extractive solvent comprising a substituted and unsubstituted phenol having 6 carbon atoms and alcohol containing 2 to 4 carbon atoms.  In the process the upper stream contains water with minimum amount of solvent that is 99.9% and the bottom stream contains alcohol with minimum amount of water.  The temperature of the process is…

    Words: 935 - Pages: 4
  • Lipid Extraction Essay

    the wet microalgae is the low extraction efficiency, because of the immiscibility of nonpolar organic solvents with water contained in wet microalgae {Yoo, 2012 #31} {Kim, 2013 #118}. Traditional method for lipid extraction from dry biomass uses a co-solvent system, which consist of a non-polar solvent and polar solvent {Halim, 2012 #7} {Kim, 2013 #118}. When the co-solvent system is directly applied to wet microalgal biomass, the microalgal cells tend to stay in the hydrophilic phase because of…

    Words: 1101 - Pages: 4
  • Thin Layer Chromatography

    funnel was then filled with 10mL of 3M NaOH and 10 mL of the dichloromethane. The funnel was capped and flipped upside-down while the lid was held. The solvent was mixed inside the separation funnel for a couple…

    Words: 1134 - Pages: 5
  • What Is Polyoxyethylated Castors?

    Molecules like cyclosporine that are non-ionisable, lipophilic and non-polar are challenging to formulate due to their low solubility and no effect of pH on solubility, and they are also solubilised in non-aqueous solutions composed entirely of organic solvents. The combination of polyoxyethylated castor oil and ethanol that are water miscible surfactants and solvents can be used to solubilise the non-polar active ingredient, cyclosporine. Therefore, the excipients are appropriate for the…

    Words: 252 - Pages: 2
  • Density Determination Experiment

    and boiling point were obtained and compared to the theoretical values. Theory Chemical substances can be identified through investigation of their chemical and physical properties and then comparing the experimental values to the standard values. Physical properties do not change the chemical composition of the substance. Physical properties include; density, boiling point, and solubility, etc. The density of a substance is the ratio of the mass of the substance to its volume. Density (ρ) =…

    Words: 611 - Pages: 3
  • Acetonitrile Lab Report

    procedures For IL-DLLME under optimum conditions, 10 mL of the sample solution containing Cd2+ or Ni2+ and PAN (10−5mol L−1) was adjusted to pH in a glass test tube with a conical bottom test tube. Using a microsyringe, the mixture of the extraction solvent ([Hmim][PF6]) and disperser solvent (acetonitrile) was rapidly injected into the previously mentioned aqueous sample. A cloudy solution (water, acetonitrile and [Hmim][PF6] ) was formed in the test tube. The ions reacted with chelating…

    Words: 1600 - Pages: 7
  • Beta Carotene Lab Report

    This allows polar substances to have a greater affinity with the stationary phase while the non-polar substance will have greater affinity with the mobile phase. The initial eluting solvent used was hexane, a non-polar solvent, which allows the non-polar molecules to elute first and allowing compaction of the column. This resulted in beta-carotene eluting first, implying non-polar characteristics of beta-carotene. Chlorophyll is seen to have a better affinity with the stationary phase due to…

    Words: 1046 - Pages: 5
  • Lipid Chromatography Lab Report

    A silica gel is then obtained and a line is marked across the bottom 1 cm from the bottom. Using a capillary tube, a drop of mixed lipid solution is placed in the middle of the line drawn. This is repeated several times to create multiple coats of the lipid solution. After the final layer of the solution has dried, the silica gel strip is placed in a jar (pigment dot above the solvent line) and observed the results. Next, we removed the chromatography paper as the solvent approached the top of…

    Words: 576 - Pages: 3
  • Acetylacetone Mixture Lab Report

    was then poured into the column and the solvent just about the silica was drained off into a conical flask. To minimize losses, the silica slurry beaker was rinsed with more chloroform and added to the column. Next, a thin layer of acid washed sand (3mm – 4mm) was added to the column. Next, two ‘curcumin soft gels’ was puncture using a scissor and spatula. The soft gels were squeezed and added to a 50 ml beaker with 30 ml of chloroform. The mixture was mixed well and the extract solution was…

    Words: 782 - Pages: 4
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