Distilled water

prepared using distilled water and cooled in an ice bath (~ 0°C) with continuous stirring for 30 minutes. The precooled aqueous solution of FeCl3 (1M) was added dropwise to the pyrrole solution. The oxidant to monomer ratio was 1:1. The polymerization was carried out for 3h under constant stirring at ~ 0°C. This mixture was allowed to settle for 24h to ensure complete polymerization. The product obtained was filtered under reduced pressure. The product was washed with distilled water…

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 between 180 to 350 C.Here the alcohol is obtained at…

glucose (0.2-1.0 ml from 0.1mg/ml D-glucose stock) were taken in a series of test tubes and the volume was made up to 1.0 ml. A reagent blank was prepared by taking 1.0 ml water alone. Anthrone reagent (0.5g anthrone and 10g thiourea, in 1L 66% H2SO4) was added to all test tubes to a final volume of 5.0 ml and heated in a 90°C water bath for 15 min. The blue color developed was read at 620 nm in a UV-Vis spectrophotometer against the reagent blank. The amounts of soluble carbohydrates in samples…

Fat was dissolved in 25 mL of the solvent (a mixture of chloroform and acetic acid). Then, 1 mL of saturated solution of potassium iodine was added, and kept in a dark environment for 10 minutes. After this time, 20 mL of distilled water and 1mL of starch solution (1.5%) were added. The sample was titrated by 0.01 N Na2S2O3, until disappearance of the blue color. The amount of peroxide was calculated, using the following equation (Harold, Kirk, and Swayer 1981). PV = (1000 (푉1-푉2)…

In this investigation, the mass (g) of a beaker and a graduated cylinder were calculated and recorded into a lab notebook. The density of distilled water was calculated without any NaCl by measuring the mass of a sample of water in a beaker, and then subtracting the mass of the beaker to leave the mass of water. This measurement was recorded into a lab notebook in Table 1 under “Total Mass of Solution” and “Mass of solution”. The contents of the beaker are then transferred to a graduated…

tube. Chem Helper states that these beads act as theoretical plates, where they maximize the surface area that the gas particles of ethanol condense on and re-evaporate, ensuring that the fractions or liquid components in the mixture, ethanol and water, are separated well. Ultimately, they allow for better separation of liquids and purer distillates than in Simple…

(13)-oleioxyoctadecanoate (OLHYOODT) (4) The reaction mixture was heated on a magnetic heater and stirrer until it reached the experiment temperature; catalyst sulfuric acid (SA) and desiccant of silica gel (SG) were added to the mixture at that moment to remove the water during the reaction. The reaction temperatures were held constant within a range of ±1°C. A mixture of HYOODA 3 (5 g; 0.01 mol), oleyl alcohol (OL) (10 g; 0.02 mol) in a 250-mL three-neck flask equipped with a cooler, dropping…

indicator. Laboratory Apparatuses and Equipment such as 650 mm long Air (reflux) condenser, 250 ml beakers, Buchner funnel, boiling beads, 50 ml burets, Coconut oil sample, filter papers, 250ml Erlenmeyer flasks, pipettes, side-arm flask, hot plate, water bath…

Purpose What makes the best bubble solution? In order to make a best bubble solution, I have to use detergent, corn syrup, water, and glycerin. By the best, I mean a mixture that creates a solution which will last long. Acknowledgments I would like to thank everyone who helped me make my project successful. First of all, I would like to thank my teacher Mr. Mackey’s help. He provided the instructions and explained how to do an essay and a poster board. Secondly, I would like to thank you my…

an odor is released (i.e. a gas) or a noise is heard or the substance changes color or a precipitate is created. An example of a physical change is ice turning into water due to heat. This is a physical change because, even though the substance changed size and shape, the substance’s molecules never altered and always stayed as water molecules. An example of chemical change is when you light a piece of wood up. This is an example of a chemical change because when it kindles, it creates, light,…