"Zinc" Essays and Research Papers

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    Determination of Trace Amount of Copper and Zinc in an Aqueous Solution by Atomic Absorbance Spectroscopy Abstract: The purpose of this experiment is to analyze a sample containing copper and zinc in trace amounts‚ where standard addition method was used and the instrument used is the atomic absorbance spectroscopy. The amount of copper obtained was 0.569 ppm ± 0.015 and for zinc we obtained 0.42 ppm ± 0.0027. Introduction: This method implies the excitation of particles in the solution sample

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    Galvanized Nail

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    Determining Amount of Zinc on Galvanized Nails Introduction. The purpose of this experiment was to find a sufficient price to charge for galvanizing nails. In order to do this the mass of zinc coating on a typical galvanized nail needs to be known. Two different methods were used to obtain these values. Gravimetric analysis was used by measuring the mass of the nail with the zinc coating and then subtracting the mass of the nail after the zinc was dissolved in acid. Gasometric analysis was

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    fruits and vegetables) using two strips of metal. The most readily available combination is copper and zinc. The zinc piece can be taken from the casing of an old carbon "D" cell (battery); some zinc coated nails may work as well. The copper can be a coin containing a high amount of copper. (Note: some recent copper coins‚ including the newer U.S. pennies‚ contain low amounts of copper mixed with zinc. If in doubt‚ use a pure copper strip.) They are stuck into the lemon‚ and wires are attached to each

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    TOTAL AIM: Experimentally determine the enthalpy change of the displacement reaction between zinc and copper sulphate. Zn (s) + CuSO4 (aq) Cu (s) + ZnSO4 (aq) Materials Required: 1M of CuSO4 Zinc powder Beaker Measuring Cylinder Thermometer Electronic weighing balance Spatula Thermometer Stop watch PROCEDURE: Measure 25cm3 of 1M of CuSO4 in a beaker Using a spatula take out zinc powder from its container and weigh out 2.5g of it using an electronic weighing machine. Use the

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    the percent copper and zinc in pennies through titration and gravimetric techniques: 1. What is the weight of a post 1982 penny? 2. What is the percent copper and zinc in a post 1982 penny? 3. How many grams of copper and zinc are in a post 1982 penny? 4. How many moles of copper and zinc are in post 1982 pennies? 5. Write a balanced reaction of zinc with HCl. 6. How many moles of HCl are needed to react completely with all of the zinc in a post 1982 penny?

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    Lab Design

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    substance Controlled Variables: * The pressure of the room. * The mass of zinc chloride reacted. * The volume of water in the beaker. * The equipment used. Materials: * Zinc chloride particles * Water Equipment: * Electronic balance (± 0.005 g) * Beaker‚ 1 liter * Graduated cylinder (100 cm^3 ± 1 cm^3) * Bunsen Burner Method: 1. I obtained 5 grams of zinc chloride particles. Electronic balance is used to measure the mass of the particles

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    Zinc helps keep the human immune system healthy and strong. Zinc is found in batteries containing nickel and carbon‚ or alkaline. Zinc is used to coat galvanized steel products and stainless steel. Other uses of zinc are found in plastics‚ rubber‚ and paints. Zinc is very popularly used in many industrial products and even fluorescent lights. On the other hand too much zinc can cause abdominal cramps‚nausea‚diarrhea‚ headaches and even vomiting. Taking too many zinc pills can lead

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    Brass Alloys

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    Introduction Brasses are copper zinc alloys. It is a substitutional alloy. Brass has higher malleability than copper or zinc. In general‚ they have good strength and corrosion resistance‚ although their structure and properties are a function of zinc content. The relatively low melting point of brass (900 to 940°C‚ depending on composition) and its flow characteristics make it a relatively easy material to cast. By varying the proportions of copper and zinc‚ the properties of the brass can be

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    Cu Synthesis Lab

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    Another cause was during the final step of the copper cycle (recovering copper)‚ the product of copper sulphate and zinc disintegrated to produce zinc (II) sulphate and copper (as copper is below zinc in the activity series).

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    Primary Cells

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    Jaycar Electronics Reference Data Sheet: BATTPRIM.PDF (1) PRIMARY CELLS & BATTERIES Many portable electrical and electronic devices are designed to be powered from batteries — and in a lot of cases‚ from primary or non-rechargeable batteries. This is the familiar kind of battery which has a fixed amount of energy stored in it during manufacture‚ and once that energy has been used up the battery is simply thrown away and replaced. There are many different types of primary battery now available

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