The detergent forms a structure called a "micelle" to sequester dirt/grease/oil and embed it to its non-polar tail leaving the polar head outside which can be easily washed with water. Soaps/detergents in the form of micelle cleans the (dirt) oil as the oil will be collected at the centre of micelle. This property of soap makes it an emulsifier. The dirt suspended in micelles is easily rinsed away. This is known as cleaning action of soap. Anionic Head -hydrophobic chain Dirt particle Cloth Which type of micelle does soap form when we are washing grease in our hands or cloth: 焱糕 Oil Water Water Oil Reverse Micelle (W/O) Normal Micelle (O/W) this is confusing reverse micelle O normal micelle

The detergent forms a structure called a "micelle" to sequester dirt/grease/oil and embed it to its non-polar tail leaving the polar head outside which can be easily washed with water. Soaps/detergents in the form of micelle cleans the (dirt) oil as the oil will be collected at the centre of micelle. This property of soap makes it an emulsifier. The dirt suspended in micelles is easily rinsed away. This is known as cleaning action of soap. Anionic Head -hydrophobic chain Dirt particle Cloth Which type of micelle does soap form when we are washing grease in our hands or cloth: 焱糕 Oil Water Water Oil Reverse Micelle (W/O) Normal Micelle (O/W) this is confusing reverse micelle O normal micelle

Macroscale and Microscale Organic Experiments

7th Edition

ISBN:9781305577190

Author:Kenneth L. Williamson, Katherine M. Masters

Publisher:Kenneth L. Williamson, Katherine M. Masters

Chapter7: Extraction

Section: Chapter Questions

Problem 1Q

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The human microbiome is one of the major frontiers of current scientific investigation. Increasing the diversity within your "gut" can be achieved by consuming probiotics from fermented foods and beverages such as sauerkraut and kefir. Kombucha is a tea co-culture of bacteria and yeast (called a SCOBY) and ethanol is one of the products of this fermentation. Lindsey regularly drank kombucha for its perceived health benefits but was concerned about her blood alcohol level. When drinking kombucha, Lindsey's maximum blood alcohol concentration (BAC) reached 0.9 mg/100mL of blood. Given that the initial half-life for ethanol in the body is 40 minutes, what will be Lindsey's BAC after one hour (60 minutes)?
Use the Referal data table below and the given formulae in the spreadsheet to complete the spreadsheet.
Volumetric pipettes are designed to deliver a precise amount of liquid, but only if you a. submerge the end of the pipette into a solution you are delivering. b. allow the pipette to drain freely, and leave any residual solution in the pipette. c. hold the pipette at a 45 degree angle and ensure that all the liquid is delivered.
At an air-water interface, fatty acids such as oleic acid liein a one-molecule-thick layer (monolayer), with the heads in thewater and the tails perpendicular in the air. When 2.50 mg of oleic acid is placed on a water surface, it forms a circular mono-layer 38.6 cm in diameter. Find the surface area (in cm²) occu-pied by one molecule (of oleic acid M=283 g/mol).
The phensuprin solid is first dissolved in ethyl acetate. One solid will be left over – what is it? That solid is collected by gravity filtration. Do we still need the liquid we collect in the flask? What is in it? Next, the ethyl acetate is extracted with 5% aqueous sodium bicarbonate. What will be in each layer? After the extractions, the organic solvent is removed by rotary evaporation. What is the solid that will be collected at this step? What solvent is being removed? We will acidify the bicarb. layer using HCl. How do we know when the aqueous layer has been acidified? A solid forms when the aqueous layer is acidified to pH 2. That solid is collected using vacuum filtration. What is this solid? Create a flow chart depicting the separation of each component of phensuprin as the procedure progresses.
The separation and purification processes given below and the method used against them are given. Which or which of these pairings are correct? I. Brewing of tea - ExtractionII. Purification of water impurities - ChromatographyIII. Separation of olive pomace from olive oil while producing olive oil-DecantationIV.Petroleum fractions obtaining - Ordinary distillationV. Obtaining essential oils and using them in perfume making - Water-steam distillation
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Answer the questions below. a) 500 ml. Acetic acid in 200 mL acetic acid-water mixture containing 30% acetic acid by volume with pure isopropyl ether will be separated by LIQUID-LIQUID extraction. Assuming the dispersion coefficient of acetic acid in isopropyl ether+water carjumine is 2, calculate the amount of acetic acid that passes into the organic phase and the extraction yield. b) What are the desired properties of the solvents used in liquid-liquid extraction processes?
You finish doing an experiemnt with Benzoin. These are the results you get:Boiling start point: 137 ceciusBoiling end point: 130 ceciusVile while empty (with cap on): 15.348Vile with crude prod (with cap on: 15.748 Your starting weight: 1.00115.748 - 15.348 = 0.400 / 1.001 = 0.3996 or 39.96% YieldAnswer the following questions with this information:Initial Mass of impure sample:Mass of recrystallized benzoin:Percent reccovery of Benzoin:Melting pot range of purified benzoin:Literature melting point for benzoin:
A tank contains 100 gal of brine made by dissolving 80 Ib of salt in water. Pure water runs into the tank at the rate of 4 gal/min, and the well-stirred mixture runs out at the same rate. Find the time required for half the salt to leave the tank
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