Chemical Reactions Chemical Reactions Introduction In this paper you learn about the reactions that occur between backing soda and lemon juice. We will also describe what is occurring with the molecules on a molecular level. Lastly we will explain what chemical bonds are formed and or broken when lemon juice and backing soda. Observations of the Reactants When most people hear baking soda they think of the bright orange box sitting in their pantry or refrigerator soaking up the foul odors
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Elimination Reactions ________________________________________ As described previously‚ primary alkyl halides generally undergo substitution reactions with simple nucleophiles by an SN2 mechanism. Secondary alkyl halides‚ often react with simple basic nucleophiles to give a mixture of products arising from both substitution and elimination. As with substitution reactions‚ the rate at which elimination reactions proceed can be proportional to both the concentration of the base and the concentration
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People undergo total knee replacement when arthritis or injury erodes the joint’s natural cushioning to the point where it’s hard to walk even short distances without severe pain. Knee replacements now cost the NHS more each year than total hip replacements. An ageing population and an increase in obesity-related conditions are placing an increasing strain on NHS resources‚ with the number of knee replacements performed rising by 15 per cent last year from 59‚391 to 68‚300. Doctors
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initiator dissolved in monomer is taken in a vessel and heated initially to poln temp. by a hot jacket to initiate the reaction. Monomer is added with constant agitation/ stirring for effective heat and mass transfer. Polymerisation reaction involves extensive bond formation in homogenous system and is exothermic. (25 – 30% poln) Post poln stage :- As the reaction proceeds‚ the reaction mixture becomes viscous and is then transferred to the main reactor and is placed in a thermostat maintained at a higher
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Light Dependent Reactions The light dependent reaction of photosynthesis involves the transfer of sunlight energy into two things: The production of ATP Reduction of coenzyme NADP to NADPH NADP – Nicotinamide adenine dinucleotide phosphate NADPH – Reduced NADP The energy from sunlight is used to excite an electron‚ within a primary pigment‚ to a higher energy level. The excited electron is then donated to an electron acceptor leaving the chlorophyll molecule oxidised and reducing the acceptor
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complex reactions and reaction sequences‚ where raw materials react together to give the product. Such chemical process often releases energy‚ in the form of heat‚ and the reaction is described as exothermic. Many of these reactions may also evolve gases at high rates‚ and could cause reactor over-pressure. Thermal runaway reaction Runaway reactions are thermally unstable reactions where the heat of reaction can raise the temperature of the reactants sufficiently to accelerate the reaction rate out
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What is meant by assessment? What are the strengths and weaknesses of the assessment types and methods you use? How would you involve your learner into the assessment process? Why do we need to keep records of assessment? Assessments are a critical part of the education system; highlighted by Black and Wiliams’(1998) who define assessments as activities providing “information to be used as feedback to modify the teaching and learning activities in which they are engaged”. There are two forms
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diseases‚ especially cancer. ANTIOXIDANTS are molecules that can donate an electron to another molecule that has an unpaired electron‚ AKA a free radical.. By donating an electron‚ antioxidants help stop the chemical reaction called oxidation. Think of rust- that’s an oxidation reaction. So basically‚ what antioxidants are important for is to help keep your body from rusting (aging). Are We Receiving the Nutrients We Need? Are all Supplements created equal? Average adult needs to consume 5-10
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Lyceum of the Philippines University (Cavite Campus) Reaction Paper Slumdog Millionaire National Service Training Program (NSTP02G) Passed by: Bedua‚ Camille F. Passed to: Mr. Stanley Ybañez In the world where we stand today‚ money is such an accommodating material that almost everyone would do everything to gain this. The movie of Slumdog Millionaire by Danny Boyle is all about the struggle of brothers Jamal and Salim towards living. Along with their friend and Jamal’s lost love
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Stub In microwave and radio-frequency engineering‚ a stub is a length of transmission line or waveguide that is connected at one end only. The free end of the stub is either left open-circuit or (especially in the case of waveguides) short-circuited. Neglecting transmission line losses‚ the input impedance of the stub is purely reactive; either capacitive or inductive‚ depending on the electrical length of the stub‚ and on whether it is open or short circuit. Stubs may thus be considered to be
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