al Chain Reactions: Bromination of Arenes Introduction The purpose of the bromination of arenes was to determine the different reactivities of different hydrocarbons with different hydrogen atoms when reacted with bromine under free-radical substitution. The time it took for the bromine color to disappear was used to determine the order of reactivity of the different hydrocarbons. Data and Results The data of the 10 hydrocarbon tubes and the 2 control tubes with bromine and dichloromethane in
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place which in turn produces electrical energy which finally drives the alarm or radio. The two significant contributions made by chemistry towards our lifestyle is the protection of our health and hygiene. The purification our water by process of chlorination‚ dental cleanliness from toothpaste‚ sterilization‚ the control and the cure of disease are all a part of daily living discovered and created by chemistry. These discoveries make up a major component for the protection of our health and hygiene
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Chemistry Revision F331 Isotopes - atoms with the same atomic number‚ but different mass numbers 131I - radioactive tracer for thyroid. 99Tc for tumours. Radioisotopes - gamma emitters & short half life - long enough to detect‚ but not long enough for damage. Beta particles emitters are more useful than alpha particle emitters because they penetrate more and so are more easily detected. Also‚ less damaging. The half life is the time taken for half the isotope to decay Mass left = initial
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UNIVERSITY OF CAMBRIDGE INTERNATIONAL EXAMINATIONS International General Certificate of Secondary Education CHEMISTRY Paper 1 Multiple Choice Additional Materials: Multiple Choice Answer Sheet Soft clean eraser Soft pencil (type B or HB is recommended) 0620/01 October/November 2008 45 Minutes *6400528663* READ THESE INSTRUCTIONS FIRST Write in soft pencil. Do not use staples‚ paper clips‚ highlighters‚ glue or correction fluid. Write your name‚ Centre number and candidate number on the
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Abstract In the following project we are discussing about distillation. The operation of the distillation is employed for the purification of liquids from non-volatile impurities. The liquid is heated to the vapor phase and then is collected and recondensed to give back the pure liquid .The non-volatile impurities are left behind in the flask. Here our main focus will be at the fractional distillation. It is the process in which we separate the different components of a mixture on the basis of the
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Dr. GEORGE ROMBO Cholera This is an infection of the small intestine caused by bacterium vibrio cholera. Transmission is mostly from the fecal contamination of food and water that is caused by poor sanitation Susceptibility About 100 million bacteria must typically be ingested to cause cholera in a normal healthy adult. Children are also more susceptible with 2- 4 year old having the highest rates of infection Individual susceptibility to cholera is also affected by their blood type with
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Shiga toxin results in a more severe form of cramps‚ diarrhea‚ etc. VII. Treatment & Prevention. • Treatment o Supportive care.. watch for dehydration…etc o Use of antimicrobial drugs to shorten the length of the disease. • Prevention o Chlorination of water o Correct disposal of sewage VIII. References • Bauman W‚ Robert.
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sedimentation process‚ the water to be treated is passed through a media consisting of several layers of graded sand and anthracite charcoal to screen out all foreign particles which did not settle down in sedimentation basin. Maynilad use the chlorination method for disinfection purposes‚ having a dosage of only 0.3 – 1.5mgl of chlorine. Finally‚ the water sent to storage and ready for the distribution. Then‚ we have started the plant
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industrial applications. In general the methods used include physical processes such as filtration‚sedimentation‚ and distillation‚ biological processes such as slow sand filters or biologically active carbon‚ chemical processes such as flocculation and chlorination and the use of electromagnetic radiation such as ultraviolet light. Nowadays‚ people who sell purified water sells water expensive. In this study‚ we would like to propose if using dirty water would purify water. B. Statement of the Problem:
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reducing the risk of diarrheal disease. Through the S E M working groups such as Health Officials eg. Nurses‚ and Teachers will educate on house hold water purification intervention procedures for Boiling‚ exposure to sunlight‚ UV tradition (lamps)‚ Chlorination‚ filtration‚ and UV rays disinfectant. Intervention for proper sanitation will also be given. Other groups such as Clubs‚ Village council officials will monitor and assist community members where
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