Extraction of metals The History of Metals. Metals have been used by people for many thousands of years. Gold and silver‚ found as native metal‚ were used both as jewellery and as a status symbol - nothing new there. These metals were known in the Stone Age‚ but gold and silver are too soft to be used as tools. The first really useful metal to be discovered was bronze. This began the Bronze Age. Bronze was used extensively for tools and weapons in Asia and Africa from 4‚500 B.C. (6‚500 years
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Beakers15 cm Cheesecloth1 Resealable Bag1 Rubber Band (Large. Contains latex pleasewear gloves when handling if you have a latex allergy).Standing Test TubeWooden Stir StickFresh‚ Soft Fruit (e.g.‚ Grapes‚ Strawberries‚ Banana‚ etc.) ScissorsDNA Extraction SolutionIce Cold EthanolYou Must ProvideContains sodium chloride‚ detergent and waterFor ice cold ethanol‚ store in the freezer 60 minutes before use. Procedure If you have not done so‚ prepare the ethanol by placing it in a freezer for approximately
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EXTRACTION OF METALS SUMMARY Most metals exist in compounds in rocks in the Earth’s crust. Many of these ores contain oxides or sulphides of the metals. The compounds need to be reduced to produce the metals as elements. Metals are very useful to us because of their special properties. Reduction means removal of oxygen or gain of electrons. Carbon is a good chemical reducing agent because it readily combines with oxygen‚ but it is only useful for the metals below it in the Reactivity
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Experiment 2: Extraction – Evaluation Summary Labs reports must be typed and chemical structures must be drawn with ChemDraw. Report must not exceed three pages (including this page). Page limit does not include any attached spectra or references. ** Deductions for hand written report/structures and exceeding page limit ** Report Breakdown Data/Results: _________________ /10 Discussion: _________________ /10 Report Total: _________________ /20 Other Lab Marks
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I. Executive Summary Acme Home Improvements Inc.‚ founded in 1982 in Raleigh‚ N.C.‚ has recently decided that an expansion into Canada and Mexico is essential. Acme currently has 125 U.S. locations with annual sales of $5‚400‚000‚000 with $280‚000‚000 net income. Acme Home Improvements Inc. immediate expansion into Mexico City is in the interest of seeking greater profits and buffering against downturns in the U.S market. Acme’s Chief Operating Officer‚ has decided to sponsor the project to
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SOLVENT EXTRACTION Solvent extraction‚ also known as liquid extraction and partitioning‚ is a method to separate compounds based on their relative solubility in two different immiscible liquid‚ usually water and organic solvent. It is an extraction from one liquid phase to another liquid phrase. Liquid extraction is a basic technique in chemical laboratories‚ where it is performed using a separator funnel. This type of process is commonly performed after a chemical reaction as part of the work-up
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ACME Fireworks Recommendation Robert Morgan BUS 311 Michael Huang October 06‚ 2014 ACME Fireworks Recommendation As a company grows it may become necessary to change the businesses’ entity and the way in which it conducts business. ACME Fireworks has received inquiries from several large retailers that will enable the business to expand. In order to accommodate this expansion‚ ACME must consider hiring more employees. The owner is concerned about his personal liability should the company fall
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Acme Fireworks is a fireworks retailer that sells fireworks and does displays of fireworks. Two years ago the company started in the owner’s garage and has 15 employees. The owner has informed me that we have big orders to fill and promised the consumers we could deliver. The owner is needing to hire more skilled labor for the orders to be fulfilled. If the orders don’t fall through‚ the owner is now not only in fulfilling the orders but not being able to pay the added skilled labor if the orders
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Extraction Report For experience 4c we were supposed to determine which one is the organic layer in three different tubes that has two layers. To determine which is aqueous (water) or organic‚ I used the technique of adding droplets of water to each tube. If the layer is water‚ then the drops of added water will dissolve in the aqueous layer and increase it’s volume. If the added water form droplets or a new layer‚ then it is the organic layer. Tube 1 (water and n-butyl chloride)‚ after adding
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1 Automatic Keyphrase Extraction and Segmentation of Video Lectures Arun Balagopalan‚ Lalitha Lakshmi. B‚ Vidhya Balasubramanian‚ Nithin Chandrasekharan‚ Ashwin Damodar Amrita School of Engineering‚ Amrita Vishwa Vidyapeetham‚ Coimbatore‚ India Abstract—Keyphrases are essential meta-data that summarize the contents of an instructional video. In this paper‚ we present a domain independent‚ statistical approach for automatic keyphrase extraction from audio transcripts of video lectures
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