Abstract The purpose of this experiment was to perform a liquid-liquid extraction method to extract the caffeine from the tea bags that were provided‚ and then recrystallize the caffeine. The solvents used in the experiment were an aqueous sodium carbonate and dichloromethane (DCM). Anhydrous calcium chloride pellets were used to dry the solution and emulsion layer and the DCM was then decanted. After washing the anhydrous calcium chloride pellets with more DCM‚ the solvent was evaporated‚ leaving
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People have argued about the use of plastic bags for a long time. The arguments for both sides seem to have more and more reasons every time. I believe that plastic bags are great for many reasons. Plastic bags convenient and take up less space in landfills than a paper bag. Plastic bags are an inelastic good. Replacing it would not be easy to do. Plastic bags are super convenient. They have many good things about them. They are light weight so it is easy to transport them and carry them. They
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Bella Omann “How It Feels to Be Colored Me” Deconstruction Campbell January 16‚ 2015 Deconstructing the Bag Analogy for “How It Feels to Be Colored Me” Zora Neale Hurston states “I feel like a brown bag… in company with other bags‚ white‚ red‚ and yellow” (Hurston 185-186). Each one of these colors represents a different race‚ brown being African- Americans‚ white being Caucasian‚ red being Indians and yellow being Asians. The wall that they all lean upon is the world in which they live in. She
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that it would take 5 weighings as described by the equation for an unknown item value: However‚ this is an overestimate as there is a way to determine the lighter of nine items with only two weighings. This was overlooked in the last POW (Eight Bags of Gold). Nine items can be weighed by dividing into three sets of size three. Comparing two sets together would determine which set contained the lighter item. With the last weighing‚ one can determine the lightest item. This raises the limit of
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example‚ you could reduce your waste‚ use re-usable bags‚ and spread the word! Being eco-friendly is easy to do. Chinese stores could sell reusable bags for groceries‚ or other products. They could even offer a discount for using a reusable bag. Another great thing about being eco-friendly is that it’s very easy to do! It’s not too hard to throw away trash in a trash can‚ not the ground‚ is it? Is it that hard to recycle things‚ or to buy a reusable bag and use it? No! It is very easy! Despite all of
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It all started when I was in the fifth grade. Our class was out at recess playing a game of flag football‚ girls against the boys. There stood Penny Clark‚ here hands cupping her nose‚ “Ronnie it’s just a game of FLAG football!” she cried. I had punched Penny when she yanked my flag off of my hip and did a victory dance in front of me while waving my flag in my face. I put the flag back on my hip after she dropped to the ground and the flag landed at my feet‚ “It’s a boys sport you got what
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BIODEGRADABLE SM PLASTIC BAG IN DIFFERENT SUBSTRATE ABSTRACT The purpose of this Investigatory project is to determine the effect of different substrates on the biodegradability of SM plastic bags. The materials needed are: 6‚ 1-litre glass jars; 6‚ 7”x9” aluminums trays; 12 pcs. 3”x4” SM plastic bags; 500g loam soil; 500g compost soil; 500mL seawater; 500mL tap water; Analytical balance; Graduated cylinder; and Weighing scale. The procedure involved cutting the SM plastics bags into 3”x4” sizes
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population has died out due to unsustainable methods of resource use. All this is in the ancient past‚ but still‚ one thing remains: plastic. As the waves roll upon the beach‚ they hold within their grasp plastic wrappers‚ containers‚ but most of all bags. They drift in the wind over America’s great prairies and are caught on rocks at the highest peaks. Animals are seen wrapped in plastic struggling to move and breathe while others lie motionless on the ground having given up the struggle to free themselves
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California State University‚ Chico Institute for Sustainable Development Life Cycle Assessment of Reusable and Single-use Plastic Bags in California January 2011 Produced under contract by: California State University Chico Research Foundation Author: Joseph Greene‚ Ph.D. Sustainable Manufacturing Program California State University‚ Chico Chico‚ CA 95929-0789 Funding provided by Table of Contents Table of Contents..........................................................................
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best solution to solve the worldwide plastic bag problem? As time goes by‚ the situation with our planet becomes worse. People are the main cause of the already damaged environment and unfortunately a lot of them do not even realize that they harm their own home. One of the biggest problems that have deteriorated is the plastic bag problem. It is a growing menace to humans and the consequences of it can be very bad. For example‚ plastic bags are made of petroleum‚ and when used – they
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