Chemistry IGCSE Paper 6 revision guide You can change the temperature and concentration used (not both at the same time though) You need to keep the diameter of the conical flask the same‚ if it is thinner then the cross will disappear sooner‚ the cross also has to be the same‚ volumes too (This set up is mostly if you want to test the gases‚ otherwise you can use the standard set up) The limestone cycle: 1. Burn the limestone
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Coursework 4 Copper Name of student: Alfiya Ospanova Tutorial group: G Copper is one of the earliest elements explored by humanity. Due to the special red shade it was easy to find in ancient times. The metal was named according to place where it was found‚ the Cyprus islands. Copper produced in massive stars and spread in the world as minerals like chalcocite and chalcopyrite (sulfide of copper)‚ azurite and malachite (carbonate of copper)‚ cuprite (oxide of copper). The
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rinsed completely. As you wear them on your body‚ the chemicals soak into your skin. Harsh chemicals are just as bad for your fabrics as they are for your health. According to the research‚ users are increasing the potential for fires by using chlorine bleach in their laundry. As the chemicals break down fabric fibers‚ the amount of lint increases and may catch fire in the dryer. What’s even more disturbing is that manufacturers are not legally required to list their ingredients on the labels.
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ionic bond was held together using electrostatic attraction. This resulted in a sodium chloride compound (producing oppositely charged ions) forming. (Na+ ion and Cl- ion). One electron was transferred from the sodium atom (1s2‚ 2s2 2p6‚ 3s1) to the chlorine atom (1s2‚ 2s2 2p6‚ 3s2 3p5) and two ions were formed. The ions gained full outer electron shells. The ionic crystals are a giant lattice
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In this practical the aim was to determine the concentration of Na2CO3 in a standard solution‚ by using Hydrochloric acid to neutralise it. This experiment involved using distilled water to dissolve the sodium carbonate until 250 ml of solution were made. I had to calculate‚ from the information provided‚ how much sodium carbonate to use in the making of the solution. Using the volume and concentration of the solution‚ I was able to calculate the moles of the solution (concentration x volume). Using
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Our entire universe is made up of matter which is constantly changing forms and evolving into other forms of energy. Chemistry is defined as the study or science of this ever changing matter. Or chemistry is essentially the study of materials and the development of new materials for the betterment of humanity. We use chemistry from the beginning of the day till its end‚ the toothpaste we use to brush our teeth is made of abrasives‚ fluoride‚ and detergents. It is a very simple fact that chemistry
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harmful‚ sometimes helpful. The reason however that they have become harmful‚ is due to the perversion of nature that happens within a war. Nature is corrupted by the technology around it created by man to kill one another‚ it can be damaged (e.g. when chlorine gas seeps into the earth) or it can be used to cause damage (The flamethrowers). All in all‚ the whole war was a massive struggle between technology and nature; however one individual throughout the story is the link between Nature and Technology
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IGSCE Chemistry Notes Oxides Oxides are used to determine whether an element is a metal or a non-metal. Most non-metals are classed as acidic oxides. While most metals are classed as basicoxides. Acidic Oxides * Reacts with water to form acids * Neutralises alkaline solution to form salt + water Basic Oxides * Neutralises acidic solutions to form salt + water Amphoeteric Oxides * These are non-metals which display both acidic and basic properties Alkaline Oxides * Reacts
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FIITJEE Talent Reward Exam for student presently in Class 10 PAPER–1 Time: 3 Hours Maximum Marks: 214 Instructions: Caution: Question Paper CODE as given above MUST be correctly marked in the answer OMR sheet before attempting the paper. Wrong CODE or no CODE will give wrong results. 1. This Question Paper Consists of 7 Comprehension Passages based on Physics‚ Chemistry and Mathematics which has total 29 objective type questions. 2. All the Questions are Multiple Choice Questions having only
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Competitive Nucleophiles Introduction: The purpose of this experiment was to compare the relative nucleophilicities of chloride ions and bromide ions in two different reactions. One reaction involved n-butyl alcohol and the other involved t-pentyl alcohol. We performed the reactions and compared the percentages of alkyl chloride and alkyl bromide in the product. To perform this experiment‚ we used methods including heating reaction mixture under reflux‚ extraction using a separatory funnel
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