Resolution of Matter into Pure Substances – Paper Chromatography Abstract The purpose of this laboratory was to determine how different substances have different solubilities in a given solvent. This was accomplished using the method of chromatography. The solubility of each substance was first determined by dropping a drop or two of each on a line drawn 2 inches above the bottom of a piece of paper. Then the paper was lightly bent in order to tape both sides of the paper leaving about a 4 centimeter
Free Solubility Chemical substance Sodium chloride
CHAPTER 7 Summary of Findings‚ Conclusions and Recommendations The study made the Pili pulp as the center of development‚ a nutritious food material. The product is made for culinary purposes‚ salad dressing‚ shortening‚ for canned sardines and other food preparations. It has more nutritional benefits than the existing cooking oil products in the market. The objective of this study is to determine the viability of producing cooking oil from extract of Pili pulp and the additional source of income
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Conclusion The theme in the novel “A Thousand Splendid Suns” by Khaled Hosseini is the inner strength of a women even in the darkest of times‚ which he has shown through symbolism‚ metaphors / similes‚ and irony. Both Mariam and Laila endure so much heartache in their lives because they are women‚ yet they continue the strength to pull together and persevere. Mariam was born in a world which turns their back on women. She has a father who refuses to acknowledge her existence‚ a husband who abuses
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Introduction Flash-Column Chromatography is another useful technique used to separate and purify complex mixtures of compounds. In this experiment‚ TLC is used to determine the best solvent system for the column. Due to Flash-Column Chromatography1 being an inexpensive technique‚ many scientist use this process for drug and natural product purification. Method By using the information from Experiment 6B‚ the TLC solvent system used was 30% EtOAc: 70% Hex. Experiment 7 was broken into two parts‚
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In our hypothesis we predicted that the enzymes in the pineapple will denature when the temperature is changed. The prediction was partly correct. Pineapples have special enzymes that denature gelatin molecules. Which is the reason why the pineapple and gelatin test tube remained filled with liquid‚ instead of turning into jelly which gelatin does when it’s molecules are not disturbed. Why our hypothesis was partly incorrect was lacked depth in that when changing the temperature by heating the pineapple
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Maple Leaf Shoes Ltd. Case Study 13 – Safety at the Workplace Submitted by November – 9/2010 Submitted to Central Problem The central Problem is that the Snack Bar’s employee‚ Sam Johnson‚ is infected with the AIDS virus‚ because of that his co-worker‚ Catherine Reading‚ does not want to work with him. Background Maple Leaf Shoes Ltd. Is a medium sized manufacturer of leather and vinyl shoes with its main manufacturing facility and head office in Wilmington Ontario
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10. Errors and Redesign. Throughout this experiment a number of random and procedural errors were apparent; these errors could have affected the results of the experiment in a number of ways. One experimental error that occurred during the experiment was that some flies became stuck in the food source and died. The main cause of this was the fact that the fly vials were stood up (vertically) before the flies had fully recovered from the anaesthetic. This could be overcome in future experiments by
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I am just a leaf‚ hanging high in the tree‚ I pretend that I am something that lives on the ground‚ I feel a touch of branches throughout‚ I touch a flower that grows close to me‚ I worry about me growing fast‚ I cry when I see the stars falling from the sky‚ I am just a leaf‚ hanging high in the tree‚ I understand moments in time‚ I say tomorrow is another day‚ I dream about stars deep in sky‚ I try to do my best in every way‚ I hope my dreams come true‚ even though I am just a leaf‚ hanging high
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his home state of Virginia. He expresses his willingness to take up arms to defend his state. The letter illustrates Lee’s dignity‚ loyalty‚ and bravery. The Last Leaf by Oliver Wendell Holmes The last leaf is about an old man that already lose his friends \’cause their time had already came and that man was left like the last leaf on the tree.And Oliver Wendell Holmes compares himself to that man.If he will be like him‚he want to see the other smiling than to be alone and left behind. This poem
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In these stories‚ “The Last Leaf” by O. Henry‚ “The Washwoman” by Isaac Singer‚ and “Gwilan’s Harp” by Ursula K. LeGuin‚ the main characters experience great loss. These three stories contain a similar theme which one of the character in the story had a tragic experience. Johnsy from the Last Leaf had lost her hope in life but was stimulate by her best friend‚ Sue. The old washwoman from “The Washwoman” had lost her only son. And‚ Gwilan from “Gwilan’s harp” had lost her husband‚ Torm in an accident
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