the ice bath. This will cause the alum crystals to precipitate. If the crystals do not form scratch the sides of the beaker with a stirring rod until the crystals begin to form. Filter the precipitated solutions on the filter aspirator. Once you have filtered as much crystals as possible rinse the beaker with 10 mL of 50% ethanol solution. Pour the rinse onto the paper to get all of the crystals. Get a 250 mL beaker and find the mass‚ then add the crystals to find the mass of the two. Subtract
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2.3 1.4Melting Point Determination of Aspirin 3. Results: 3.1 Mass of dried‚ recrystallized aspirin: 1.62g 3.2 Percent yield: 51.75% yield 3.3 Temperature range: 138.2 – 140.0°C 3.4 Appearance: Fine needle like white crystal Introduction Aspirin or acetylsalicylic acid is acquired from salicylic acid‚ which is mild and nonnarcotic analgesic. It helps to remove the substance in the body that trigger pain‚ fever and inflammation. The father of modern medicine
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accountanty as a careerhe future I plan‚ the future I look forward to‚ the future I work hard for so it will turn out for the best because in my life the future plays the role of a crystal ball. This crystal ball is filled with all of my hopes and all of my dreams. This crystal ball answers the question of just who I am and what I will become making it an important part of the college equation. As a student at Stockton College I hope to excel in the study of business and fulfill my dream of starting
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Good evening ladies and gentlemen‚ and thank you for coming to support Crystal and Garrett’s special day. For those who don’t know me‚ I’m Hailey Thompson‚ maid of honor and best friend to crystal for many many years I met crystal when I was little‚ too little to remember when I met her. But little do you know that we didn’t give each other the time of day. We would go dirt bike riding‚ snow boarding‚ and wake boarding together‚ but never say a word to each other. I never knew that eleven years
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Category Personal Care – Toothpaste Sector FMCG Tagline/ Slogan Switch on the power of freshness USP Colgate Max Fresh gel is infused with cooling crystals for a whole new dimension of freshness STP Segment Personal Care – Oral Hygiene – Gel Toothpaste Target Group Men and Women Positioning Colgate Max Fresh with Cooling Crystals providing fresh breath and long lasting freshness that can be seen SWOT Analysis Strength 1. Toothpaste contains menthol‚ a mouthwash ingredient‚ for Fresh
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are displayed throughout the story by the couple‚ Jim and Crystal Styan. Additionally‚ while the story progresses and while the different natures of the couple are discovered‚ contradicting dreams and desires are also uncovered. A difference in people’s personalities ultimately leads to a difference between their aspirations and ambitions as well. In the story Jim Styan possesses an outgoing and persuasive attitude‚ while Crystal Styan holds more of a docile and
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to remove the impurities. By adding an excess of sulfuric acid and cooling the solution in an ice bath‚ the technique of vacuum filtration using a Buchner funnel will be employed‚ crystals of the hydrated aluminum potassium sulfate salt will yield and these will be collected. Methanol will be used to rinse the crystals. THEORY Aluminum is the third most abundant element and is commonly used in packaging. In fact‚ 97% of all soft drink cans use this universal material. Recycling an aluminum can
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could be produced‚ dicyclopentadiene had to be cracked to get cyclopentadiene for the starting material. Cyclopentadiene and maleic anhydride were mixed together and cooled to room temperature‚ which produced crystals. The solvent was pipette out of the tube to separate the crystals. The crystals were then scraped on the filter paper to get weight and melting points. The end product yielded 82.6%. The melting point was observed at 162-163°C. This indicated a close to pure substance with the actual
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lifetime she made not one‚ but five discoveries. Each discovery was more complex than the other. Dorothy was born on May 12‚ 1910 in Cairo‚ Egypt. She was a scientist that spent her life studying different kinds of crystals. At the age of ten‚ she became interested in chemistry and crystal. This interest was encouraged by Dr. A.F. Joseph. Dr. A.F. Joseph was a friend of her parents in the Sudan and he gave her chemicals and helped her during her stay there to analyse ilmenite. She heard about chemistry
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allowed to cool to room temperature‚ and purple crystals were observed. 6 1.3mL of methanol was added to the vial as it was stirred at room temperature. 7 The vial was then placed in an ice bath for further cooling. 8 The purple crystals were collected and were dried using vacuum filtration with a Buchner funnel. 9 The crystals were washed with ice-cold methanol until the filtrate was a purple-pink color‚ and were then left under vacuum. 10 The dried crystals were placed in a test tube‚ and 178 mg of diphenylacetylene
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