Chemistry vacation Assignment Standard -X 1. Name a sodium compound which is used for softening hard water 2. Write the chemical name and formula of baking soda? 3. What will happen if the solution of sodium hydrogen carbonate is heated? Give the equations of the reaction involved? 4. Write the chemical name and the formula of bleaching powder. 5. Write the chemical formula of plaster of Paris? 6. What will happen if heating is not controlled while preparing
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Clare Chong P2 ! ! ! ! ! Chemistry Practical 4: Measuring rate of reaction Aim of experiment: To determine the rate of reaction when the concentration of I2 increases. ! ! ! Chemical equation: 2Fe3+ + 2I- --> 2Fe2+ + I2 ! ! ! Apparatus & materials: Apparatus Quantity 50ml Pipette 1 10ml Pipette 1 Pipette bulb 1 100ml beaker 2 50ml Burette 1 250ml Conical Flask 6 Timer 1 Distilled water 100ml or more 50ml Measuring
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The Chemistry of Toothpaste Toothpaste is not a new thing. It has been traced back to Ancient Egypt. They used a powdered rock and vinegar‚ which created a chemical reaction that dissolves the plaque on teeth. In 1900’s people used hydrogen peroxide and baking soda or chalk‚ pulverised brisk and salt as a toothpaste. Toothpastes today‚ are mostly made up of abrasives‚ surfactants‚ a detergent‚ a thickener‚ a moisturizer‚ water‚ flavouring agents‚ coloring‚ sweeteners‚ fluoride and desensitizers
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A Comparative Study On The Combustibility Of Ethanol (C2H5OH) And Hydrogen Peroxide (H2O2) Mixtures As Fuel Chemistry January 31‚ 2013 Revised February 15‚ 2013 Abstract In this experiment‚ the proponents used mixtures with varied proportions of ethanol and hydrogen peroxide to know which would make a more efficient‚ clean‚ and stable combination. Compared to conventional fuels‚ ethanol contains 36% oxygen thus resulting in more complete combustion. This greatly lowers
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Major Chemistry questions: 1. Analyse the progress in the development and use of a named bioploymer. This anslysis should name the specific enzyme(s) used or organism used to synthesise the material and an evaluation of the use or potential use of the polymer produced related to it’s properties. Polyhydroxybutanoate (PHB) Progress Analysis: - Bacteria first used to make PHB in 1925 at Pastuer Institute in Paris. - In 1970’s adopted by Imperial Chemical Industries (ICI) – Alcaligenes
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Taylor Skoglund Mrs. Knudson Writing 102 27 September‚ 2010 The Prestige Do you like movies? If so‚ do you like movies in the drama/mystery genre? Well there is one movie in particular that I would like to talk to you about. This movie is full of drama‚ suspense and mystery. It is titled The Prestige. This is my favorite movie of all-time and is based on the Christopher Priest novel with the same title. This film is engaging and keeps the audience guessing throughout just like a magician
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The world is going to hell. The world is always going to hell‚ soldier of fortune and diamond smuggler Danny Archer notes‚ well‚ archly in Blood Diamond -- no need to concern oneself overly about it; best to make the best of it you can and get out while the gettin’s good... and gettin’ out doesn’t necessarily mean for the long term. Danny is not a man worried about the future. Cigarettes‚ another character informs the chain-smoking Archer‚ will kill ya. "Yeah‚" he snarks. "If I survive." There are
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Tommy DelZenero Intimate Apparel Feb 6th‚ 2013 The character I really tried to focus on while watching Intimate Apparel was George‚ the man from Panama. I thought he was the best actor on the stage that night‚ but that’s not saying too much. For the first half of the play‚ the actor performed a monologue with the spotlight solely on him. After the break‚ the actor participated in scene work with multiple characters. George in the storyline is a man who works a very physically demanding job
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The Bluest Eye by Tony Morrison Summary and Analysis of Prologue and Autumn The Bluest Eye opens with two short untitled and unnumbered sections. The first section is a version of the classic Dick and Jane stories found in grade school reading primers. There is a pretty house‚ Mother‚ Father‚ Dick‚ Jane‚ a cat‚ a dog‚ and‚ at the end‚ a friend for Jane to play with. The same story appears three times in succession‚ repeated verbatim each time. The first time the text appears with full punctuation
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Madison Mitchell English 401-14 October 19‚ 2008 “Crash” This movie was very captivating and it made you think of the impacts people have on each other. In every scene of this movie‚ one person always leads to another character‚ whether it be a Chinese man being ran over by the inner city car thief‚ or the rich wife of Rick Cabot being “unhappy” all the time against other races than her own. This movie sets examples for others not to follow‚ basically concentrating on the different stereotypes
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