CHEMISTRY PROJECT WORK SESSION -2013-2014 ROLL NO- CLASS-XII ‘A’ SUBMITTED BY SUBMITTED TO ROHIT LAKHERA Mrs. ANITA BISHT CERTIFICATE This is hereby to certify that‚ the original and genuine investigation work has been carried out to investigate about the subject matter and related data collection
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Waking up this morning‚ the bright spring sunshine shone through my window. In less than an hour‚ I was ready for school and heading towards the bus stop. Walking in the direction of the main road‚ I caught a glimpse of my bus and hurriedly increased my walking speed. Feeling triumphant about catching the bus‚ I dug my hand in my blazer pocket and fetched my oyster card. The triple beep of my oyster card embarrassed me‚ but I took no notice and strolled into the bus. I fixed my eyes on a comfortable-looking
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Select five sources. Explain how useful these sources have been in informing you in your enquiry into the main features of trench warfare on the Western Front in the First World War. Introduction The five sources that I have selected to help with my enquiry are photographs‚ an extract from a newspaper article and a soldier’s diary. The reasons why I chose these five particular sources is because I believe that they are a wide variety of selections‚ dating back to many years‚ all ranging from
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Introduction We are going to do an experiment to see how surface area effects the rate of reaction when added to hydrochloric acid. I will add calcium carbonate (marble chips) to hydrochloric acid. When calcium carbonate is added to hydrochloric acid a reaction takes place. The solution fizzes and gives off the gas carbon dioxide. I will collect this gas in a gas syringe and will time how long it takes for the reaction to produce 100cm3 of carbon dioxide. CaCO3 +2HCL Co2 +CaCl2 +H2O CalciumHydrochloricCarbonCalciumWater
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ecosystems‚ plants‚ and animals adapted to that system. Many of the species in the rainforest are vulnerable to extinction because they depend on other species in certain ways. Most of the trees need certain animals to dispose of their fruit. For example: there are hundreds of different kinds of fig trees that depend on different species of animals and insects to pollinate them. The destruction of one of these species could wipe out the other. Also Native peoples of the Amazon rainforest have used
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How Enzyme Concentration can Affect Rate of Reaction The purpose of this investigation was to see how the concentration of an enzyme affected the rate at which a substance was broken down. We did this by using a white protein called casein. Casein is found in milk powder‚ it is a protein and used mainly as a binding agent in foods‚ because it is mad to proteins and joins to a phosphoric acid it belong to a group called the phophoproteins. In terms of in milk it is said to be healthier if it is
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factors of a chemical reaction affect the rate of reaction. This experiment focused on how temperature affects the rate of reaction for the reaction of alka-seltzer and water. The rate of a reaction is a value calculated to figure out how fast a chemical reaction occurs. There are three factors that can be changed that will affect the rate of a chemical reaction: surface area‚ concentration‚ and temperature. Temperature specifically affects the rate of a chemical reaction‚ because when the temperature
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killed. Romeo in turn‚ is banished from Verona. This is fatal for both of them in the end. Romeo and Juliet is set upon fate and free will. If Romeo had not gone to the party that night‚ he might not have met Juliet and they might not have fallen in love. Fate is what will happen to a character in a story no matter what. Free will is the characters own choice. An example of fate is for Romeo to fall in love with Juliet. Romeo had seen Juliet
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Gas Chromatography (GC) Definition: Gas chromatography is a physical method of separation in which the components to be separated are distributed between two phases‚ one being a stationary bed of large surface area‚ and the other a gas that percolates through the stationary bed. When the stationary phase is a solid‚ the separation process is more precisely called gas-solid chromatography. Introduction: Gas Chromatography is a technique widely used to separate complex mixtures of substances. Compounds
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texts in order to gain a better understanding of the situations certain devices are used‚ and by what kinds of people use specific devices. Contrary to belief‚ texting actually supports the rules of language‚ Grices Maxims are embedded in texts‚ for example the maxim of quantity‚ referring to the message being as long as needs be and not waffling on. Texting supports this maxim greatly‚ as it’s the quickest and most to the point means of communication. Some people use texts in certain ways in order
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