Experiment 4: Qualitative Analysis of Cations and Precipitation Reactions The overall goal of experiment four was to determine the identity of unknown cations presented to the student. But in order to know the identity of these unknowns‚ in part 1‚ Ag+‚ Pb+‚ and Hg22+ were presented to the student in aqueous solutions and then precipitated through experimentation. In part 2‚ the same procedure was enacted to determine which substances precipitated through qualitative analysis. Solubility rules
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Limiting Reagent and Percent Yield Aim To determine the limiting reagent between the reaction of lead (II) nitrate and potassium iodide. To determine the percent yield of lead (II) iodide. Date Started: 13/4/12. Finished: 19/4/12. Data collection and processing Measurements: * Amount of distilled water: 75.0ml ± 0.5ml. * Mass of watch glass: 31.65g ± 0.01g. * Mass of watch glass + potassium iodide: 32.45g ± 0.01g. * Mass of potassium iodide: 0.8g ± 0.02g. * Mass of watch
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ENG 4UI: ISU Essay Outline ----------------------- Introduction: All life and existence makes an unavoidable journey towards an ultimate end. Immortality is a mythical unattainable existence‚ barred by the presence of entropy. Mortality is a constant found in everything that was‚ is and will be. Hook:
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Since the Grignard reagent can easily react with water‚ all glassware including the 25 ml round bottom flask‚ magnetic stir bar‚ 3 and 5 ml conical vial‚ 50 mL Erlenmeyer flask‚ claisen adapter‚ drying tube and 5 glass pasteur pipets were first added to a 250mL beaker and placed in the oven for 30 minutes. After the completion of the thirty minutes‚ 0.150 g of shiny magnesium turnings and a stir bar was first added to the round bottom flask and the claisen adapter along with the drying tube packed
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Sir Isaac Newton (1642~1727) Isaac “Ayscough” Newton Jr. was born prematurely on Christmas Day in 1642; Newton grew up in the town of Woolsthorpe (England). He was fatherless and once Newton was born‚ his mother left him with his grandmother and left town in order to remarry. His childhood was anything but happy‚ but once his mother returned in 1653 after the death of her second husband she demanded that Newton leave school in order to fulfill his life as a farmer. Of course‚ he eventually proved
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Grade 11 Dynamics Lab Report Friction SPH3U1-02 Williams. C. By----James & Hao Feng & Henry Zhang Purpose: By measuring the friction and μ of a container and change different variables including mass‚ surface and gradient‚ get causes of the change of friction and μ. Materials: A container Three Pen bag in different mass A rough wood board A clean desk Rulers Thrust meter. Steps Prepare
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Isaac Newton was an English mathematician and physicist‚ considered one of the greatest scientists in history. He made important contributions to many fields of science. His discoveries and theories laid the foundation for much of the progress in science. Newton was one of the inventors of a mathematics called calculus. He also solved the mysteries of light and optics‚ formulated the three laws of motion‚ and derived from them the law of universal gravitation. Newton was
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I personally think that Isaac Newton is without a doubt‚ a hero. He is a hero because of his scientific achievements and life events. He found a way to split white light and find its color contents‚ he discovered then extended his three laws of motion that frame the world of physics‚ and for crying out loud‚ the man invented calculus. Not just that‚ these examples aren’t even including all of his very many scientific achievements‚ inventions‚ or founds. For starters‚ Isaac Newton’s theory of “fluxions”
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Introduction Isaac newton—English astronomer‚ physicist‚ mathematician‚ and scientist—became interested in science as a boy and even invented several devises while he was still young. He attended Cambridge University and later taught there. In Optics‚ newton published his principles of light and colour‚ and in his mathematical principles of natural philosophy (also known as the principia)‚ he discussed the laws of motion and the theory of gravity. Besides his scientific study‚ he spent much time
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Adol Condensation Introduction: This reaction is carried out by adding benzaldehyde and acetone into a flask. The product created is a 1‚5-diphenyl-1‚4-pentdiene-3-one‚ which includes two double bonds‚ and two benzyl ring functional groups. This is a dehydration reaction that occurs twice in order to form the diene. After obtaining the product‚ via vacuum filtration‚ it will be recrystallized and then analyzed for purity by determining both products’ melting point. The two products will be
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