through back titration since calcium carbonate does not dissolve in water. A roughly weighed amount of calcium carbonate is mixed with hydrochloric acid and then titrated against sodium hydroxide. When the indicator turns from pink to orange‚ the volume of sodium hydroxide used is taken down. After doing some calculations‚ the average percentage of calcium carbonate in toothpaste is 19.2%. This average percentage is relatively close to the expected percentage of 20% thus this experiment is a success
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Be Careful Of What You Wish For Men are believed to be the most advanced creatures on earth. Previous studies suggest that men are developed from primates‚ or ape-like ancestors. Through millions of years of continuous evolution‚ modern men are born. Modern men wish for many things. Most of all‚ they wish for development. Whoosh‚ flies a mound of earth. Swish‚ goes another mound of earth. Why is this happening? Who is digging the earth? Let’s take a closer look. In the distance‚ I can
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What makes Us Happy "Endorphins are considered the best and most legal way of achieving a high" Nathan Altman said in his Endorphins Question and Answer article. Endorphins are polypeptides that are produced in the brain. They are able to bind to the neuro-receptors in the brain to give relief from pain. Endorphins can be accredited with the affect that exercise has on the brain. The so called runner’s high is a result of endorphins being produced in the brain. Discovered in 1975 endorphins are
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Azraf Chowdhury VIII (Sunshine) What do you hope to achieve in your lifetime? According to my religious beliefs‚ life is eternal but not this one. Comparing the span of this life with my afterlife is a lot like comparing a millisecond to a millennium. Even this comparison is inadequate for the span of my afterlife. Nonetheless the time to achieve something great in this life‚ only if God keeps me alive and healthy to an approximate age of my country’s life expectancy‚ is supplementary. The things
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Guide to Writing Your Final Year Project Report Or MSc Dissertation February 2011 Abstract This guide is intended to help you produce a good final year project report or MSc dissertation. It gives advice on how to gather relevant material‚ how to organise it into a suitable form and how to then turn it into a written project report or dissertation. It also describes the conventions that should govern the structure of the report or dissertation‚ and suggests some descriptive devices that you can
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BIOL 1208 Writing Assignment 1 Cover Sheet I certify that the writing in this assignment is my individual work and is my intellectual property. It does not contain the ideas or writing of other individuals/authors. Sarah SanAngelo March 4‚ 2015 Author Date 8 Lab Section # Alex Fry Lab Partner BIOL 1208 Writing Assignment 1 Results Worksheet Lab Topic: Temperature Introduction: In this experiment‚ water and potato enzymes were mixed
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to be the most toxic to the brine shrimp by adding drops of vinegar‚ bleach and ammonia to the controlled water. We found that the vinegar was the most effective and the quickest. The ending results were very interesting when being compared to our hypothesis and we learned that some chemicals can react faster than others and each contains a different level of concentration. HYPOTHESIS: For brine shrimp exposed to increasing concentrations of three chemicals‚ ammonia will have the highest LC-50 (toxicity)
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sometimes‚ when the topic really got me interested‚ I would even expound my learnings through researches and internet browsing. I usually learn best when I listen to the teacher’s oral teaching. And also I would cooperate more in the class if the teacher is nice and considerable. But there are times when I would feel too tired because there’s too much homework and the pacing of our lessons is too slow that every topic would be repeated every day and it may get too draggy and redundant. When I reached
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during this un-popular. It recalls what individual soldiers carried with them. To a point‚ all of the soldiers carried the same items. There were the necessities that were required. Most were pointless‚ or at least seemed pointless‚ but were standard issued to carry. Each soldier carried pocketknives‚ heat tabs‚ dog tags‚ sewing kits‚ C rations‚ canteens‚ and much more.... Most of those items were needed in some way while they were out on the battlefield. “What they carried was partly a function
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APPLICATION OF SCIENTIFIC METHOD IN PHYSICSGENERAL RULES1. In the construction of devices‚ what is not expressly prohibited in the written rules are allowed. 2. For each event/game/contest‚ the First Place winner will be given 20 points; the 2nd Place winner‚ 15 points; and the 3rd Place winner‚ 10 points. 3. In case of a tie‚ each of the concerned teams will get the same points assigned to the particular winning position (1st‚ 2nd‚ or 3rd). If two teams tie for the 1st Place
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