"Iodine clock reaction persulfate ocr salters" Essays and Research Papers

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    Media essay OCR G322 - A Touch of Frost (Disability) The first scene we see is of a boy (Billy) walking through the woods at night dusting of his knees. He is very well lit and has a mischievous look on his face also his face is cut. He looks surprised and panicked when the police shout at him and chase after him‚ once the police have taken him down we get a close up of Billy’s face it’s not until then we realise that the Billy is down syndrome and we begin to feel guilty when he shouts ‘I haven’t

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    The kinetics of the Harcourt-Essen Reaction (Hydrogen peroxide variation) Aims: To find the order of the reaction with respect to the Hydrogen Peroxide (H2O2)‚ Potassium Iodide (KI) and the Sulphuric Acid (H2SO4) by the use of an Iodine clock reaction. Calculate the rate constant‚ mechanism and equation Find the effects of temperature on the rate of reaction The effects of a catalyst on the rate of reaction Find the activation enthalpy (Ea) of the reaction‚ with and without a catalyst Background:

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    I was at the medical centre on Friday for my monthly check-up. After three long years‚ Im finally expecting another baby. It has been a long wait. Every month‚ my hopes were raised as high as a tsunami wave‚ but each time they crashed down on me‚ thirty-six times in all. I felt as if God was punishing me but I wished that He would punish me more severely in another way. One thousand days passed before a little seed grew inside me. A lady with a big belly came in after me. She took a clear plastic

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    derive the rate law for the reaction. Starch will be added to the reaction to facilitate the measure of time during the reaction. The reactant solutions will contain (NH4)2SO4 and KI‚ represented as: (NH4)2S2O8 + 2KI -> I2 + (NH4)2SO4 + K2SO4 This can be simplified to: S2O82- + 2I- -> I2 + 2SO42- These equations can only be carried out and be visible after the iodine has completely reacted with thiosulphate added – two moles of thiosulphate for every mole of iodine. Once all the thiosulphate

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    worked on different areas of businesses including: customer service‚ sales‚ supply chain management‚ accounting‚ finance and recruiting. Currently‚ I lead a family business as General Manager. But the experience I want to focus on is the “off-the-clock” one: volunteering. I have volunteered for many social causes for most of my life including: academic reinforcement in public schools; building emergency houses with TECHO Nicaragua; and most recently‚ I am leading a project to collect books and create

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    Week 10: Oxidation and Reduction Reactions: The Reactions of Copper Data: Part I: Preparing a solution of copper (II) nitrate Initial mass of copper wire: .520g Mass of copper wire after vigorously scouring: .518g Observations of Copper (II) ribbon mixed with HNO3: Solution turned green. Thick brown gas formed. Copper (II) bubbled vigorously. Cu (II) dissolved‚ solution appeared green/blue. After the addition of H2O a blue crusty precipitate formed. Part II: Synthesis of solid copper

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    2) Trends in chemical properties of the elements • The Group 7 elements are oxidising agents which gain an electron when they react • The ability to oxidise decreases down Group 7 • This can be shown by halogen displacement reactions where elements higher up the group will displace elements further down the group • This can be done with chlorine dissolved in water or by bubbling chlorine gas through NaBr(aq) or NaI(aq) Cl2 + 2NaBr ( 2NaCl + Br2

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    OCR UNIT 22 Disabled children and young people with special educational needs are entitled to access to children’s services‚ an education‚ health services‚ housing and Equality and non-discrimination entitlement. (The Disability Discrimination Act DDA) These arise when one or more public body has a relevant duty – whether this duty is owed to all disabled children or only to some‚ for example those with a certain level of need or those in a certain age group. It is vitally important ant that recognition

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    Bromobenzene Reaction Lab

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    During the initiation and formation of the Grignard crushed magnesium was placed in a round bottomed flask with an iodine crystal with a bromobenzene solution with a stir bar. Once the stirring began‚ the solution turned brown and over time began to lighten up. The color change to brown indicated that the reaction began and this is why an iodine crystal was placed in the solution. The reaction started to boil due to its own reflux so heat didn’t need to be applied. Next the anhydrous ether solution was

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    Reaction Paper

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    students who facilitated the outreach. Their crispy laughter was evident of their enjoyment when we tour them to SM Iloilo and bought them snacks to ease their grumbling stomachs. Happiness is in the air- happiness was seen in their faces until the clock says our time is over and we need to return them to their respective parents. When we gave them gifts‚ their wide smiles and sparkling eyes was instilled in my mind because it was heart soothing seeing them that exalted. It was a tiring day activity

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