Flint became the backbone of economy. He began digging the earth‚ taking out new treasures and burning them. Thus was produced‚ some 6000 years ago‚ a new mineral‚ and from that a new material to which‚ much later‚ we have given the name copper metal. And that day began the Copper Age. In fact‚ this was the beginning of both mining and metallurgy. Not satisfied with copper any longer than a few hundred years‚ he began experiments with other metallic ores like tin‚ zinc and lead‚ and with a stroke
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Date: 20/03/13 Flame Test – Investigating Compounds Aims To identify the presence of a relatively small amount (ie low concentration) of a metal ion in a compound. Method 1. Clean a platinum or nichrome wire by dipping it into concentrated hydrochloric acid. 2. Hold the platinum or nichrome wire at the hottest or blue part of a non-luminous Bunsen flame. 3. Repeat until the wire does not produce any colour in the flame (note: do not touch the wire‚ as salt in sweat will produce
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Aim • To calculate the SHC of water • To see how accurately I can measure a known quantity Research Question • Will the experiment carried out give us a good approximation of the SHC of water? Hypothesis • The result we will get as the SHC of water will not be exactly the same as the literature value‚ but will be a very close figure to the literature value of the SHC of water as there will be some limitations to our experiment. Variables Independent: temperature of water Dependent:
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improper BP cleaning‚ reverse etching or activation. Possible causes of poor adhesion include: • Improper activation. Proper activation of the base metal is important for deposit adhesion. Different base metals and hardness require different reverse etching times or activation steps. It’s therefore important to know the base metal being plated. • Improper cleaning. Parts need to be properly cleaned BP to remove all traces of oils‚ organics and surface debris. Refer to both the Process
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Discussion The reactivity series is a list of metals arranged in order of their reactivity based on displacement reactions‚ reduction of their oxides by hydrogen or carbon‚ the relative ease of decomposition of their compounds and reactions with oxygen‚ dilute acids and water. The higher up a metal is in the reactivity series‚ the more reactive it is. In the experiment conducted‚ the three metals‚ magnesium‚ zinc and copper each had to undergo displacement reactions and reactions with water‚ oxygen
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Bunsen burner to light the gas up. A Bunsen burner‚ named after "Robert Bunsen"‚ is a lab piece equipment that produces a single flame which is used for heating‚sterilization and combustion. Our instructor‚ Dr. Immel‚ provided us with six heavy metals those metals were: Barium‚ Calcium‚ Lithium‚ Potassium‚ Sodium‚ Strontium. My group got a platinum flame loop‚ and decontaminated it with the water beaker filled half way with water. To light the Bunsen burner my group used a striker‚ which Dr. Immel provided
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OrOn a Self-Recovering Coherer and the Study of the Cohering Action of Different Metals JAGADIS CHUNDER BOSE Proceedings and List of Papers Read April 27‚ 1899 The Lord Lister‚ F.R.C.S.‚ D.C.L.‚ President‚ in the Chair. A List of the Presents received was laid on the table‚ and thanks ordered for them. The following papers were read: I) “Data for the Problem of Evolution in Man. I. A First Study of the Variability and Correlation of the Hand‚” by Miss M. A. Whiteley‚ B.Sc.‚ and Karl Pearson‚
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the process of coating a metal object with a thin layer of another metal by means of electrolysis. 2) What is Copper Plating? Copper plating is a coating of copper metal on another material‚ often other metals. Plating is designed to increase durability‚ strength‚ or visual appeal‚ and copper plating specifically is often used to improve heat and electrical conductivity. 3) What are the uses of electro-plating/copper plating? Electroplating is used to give metal objects a better appearance
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Indians‚ ornamental sarees with it. The metal threads were twisted‚ doubled or wrapped around some other thread such as cotton. With the advancement of technology‚ metal/conductive textiles found extensive functional applications. These materials have high electrical conductivity and radar reflecting property‚ yet are lightweight and flexible. Various methods have been developed to coat fibers and textile materials by metals. » sputter coating » coating metal powder with binders » electro less
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object is being described in each one. Use the words in bold to help you. You will find the objects hidden in the word grid at the bottom of the page. 1. The most important part of this object is a strip of two different metals‚ one on top of the other. As they heat up‚ both metals expand‚ but one does it faster than the other. The strip bends and connects with a switch‚ which turns off the power supply. When the strip cools down‚ the metalscontract and the switch is disconnected. (1 word) 2. This
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