PRE LAB REPORT Reynaldo Riboul TLC and Column Chromatography October 6‚ 2013 Table of Chemicals: Chemical Hazards Mol. Wt. Density Grams Moles Acetone Flammable‚ Irritant 58.08 g mol−1 0.791 g cm−3 2.0 g 0.0344 Hexane Flammable‚ Irritant‚ Dangerous to Environment 86.18 g mol−1 .6548 g mL−1 9.0 g 0.1044 Fluorene Very toxic to aquatic life with long lasting effects 166.223 g/mol 1.202 g/mL 0.3 g 0.00180 Fluorenone Irritant 180.20 g mol−1 1.13 g/cm3 0.3 g 0.00166
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Lab 5 The Diffraction Grating Chinua McDonald Objective: To measure the wavelength of light with a diffraction grating. Theory: The two types of diffraction gratings are the transmission and reflection gratings. They are made by ruling on a piece of glass or metal a number of evenly spaced lines with a fine diamond point. Diffraction phenomena can be analyzed in terms of Huygens’ principle‚ according to which every point on the wave front of a wave should be considered as a source
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Food Adulteration Food adulteration with poisonous chemicals has reached a dangerous proportion posing serious health hazards in the country‚ said experts and government officials yesterday at a discussion jointly organised by The Daily Star and non-government development organisation RDRS Bangladesh. Basic food items on the market like rice‚ fish‚ fruits‚ vegetables‚ and sweetmeats are adulterated with hazardous chemicals in an indiscriminate manner‚ though food-grade preservatives and colours
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Some food in this world are made using microorganism to produce a desire flavour‚ taste and texture of the food. For examples: yogurt‚ tapai‚ cheese‚ bread and others. Starter cultures is used in these food production. A starter culture is a microbiological culture which actually perform fermentation. These starters usually consist of a cultivation medium‚ such as grains‚ seeds‚ or nutrient liquids that have been well colonized by the microorganisms used for the fermentation. These starters are formed
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FOOD adulteration is the process of adding chemical substances with foods‚ which should not be contained within food and beverages. Chemical substances or simply adulterants may be internationally added to substances to reduce manufacturing costs‚ or for some deceptive or malicious purpose. When profit in business is more important than morality‚ then it is possible to add the poisoning contents to the foods and beverages. A limited number of people die without foods but large population have been
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APPARATUS a) Dye reservoir. b) Stilling tank. c) Observation tube. d) Stopwatch e) Graduated cylinder THEORY Reynolds number is used to distinguish between laminar‚ transitional and turbulent flows. Re = Reynolds number V = Fluid velocity (m/s) d = Pipe diameter (0.012m) v = Kinematic viscosity (0.893 x 10-6m2/s) Laminar Flow‚ Re < 2000 Laminar flow denotes a steady condition where all stream lines follow parallel paths. Under this condition‚ the dye will remain
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CHM130 Lab 2 Measurements: Accuracy and Precision A. Data Tables (36 points) Place your completed data tables into your report here: (original Data Data Table 1 Measurement Original Data Calculated Data Length of aluminum plastic packet 5 cm 50 mm Height of aluminum plastic packet 6.5 cm 65 mm Temperature of faucet water 26 degrees C 78.8◦ f Temperature of ice water 7 degrees C 44.6◦ f Volume of water in 10-mL graduated cylinder 7.1 ml 0.0071000L Volume
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Can I print T Shirts using dye sublimation printing? Dye sublimation printed shirts have started to become rather popular‚ sublimation tends to makes the t shirts more wearable and comparably soft. Dye sublimation printer is basically a computerized printer that turns the printed image‚ mirror reverse‚ in the form of gas and with the use of heat transfers the gaseous dye on the cloth giving the print ‘a no hand feel’. This process makes the most vivid and real images to be printed on the t shirts
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least twice a day. We live in a world where the variety of food is immense‚ and we decide what we eat and how it will affect our bodies. As a reason‚ flavor‚ health benefits‚ and cost are the differences between eating fresh foods and canned foods. The most notable difference between these two kinds of foods is their flavor. Fresh foods have great flavor and taste because they keep all their natural conditions. In contrast‚ canned foods lack a lot of its flavor characteristics because there are some
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Analysis of Essential Oils using Gas Chromatography Lyndon Justin T. Guzman Institute of Chemistry‚ University of the Philippines‚ Diliman‚ Quezon City Date Performed: February 2; February 4‚ 2011 Date Submitted: February 18‚ 2011 Abstract The purpose of this experiment is to isolate the essential oil from eucalyptus leaves as a pure compound; moreover‚ the components of the essential oil‚ camphor and limonene‚ will be then separated using gas chromatography technique‚ identify the components by
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