promoted. Hypothesis: I predict that air (oxygen) and water are necessary for iron to rust. The nail in water with air will rust while the nails in dry air and in boiled water with no air will not. I also predict that galvanizing the nail with zinc and greasing the nail and painting the nail and electroplating the nail will inhibit rusting. I also predict that adding NaCl to the test tube with water and air will promote rusting of the iron nail. Background information: Rusting is the chemical
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U-shaped spiral rock breaking machine manufacturer nail on the adjustment ring ‚ injected between zinc alloy‚ making it closely‚ when a new installation or replacement of rolling acetabular wall ‚ in after 6-8 hours ‚ you should check its fastening and tighten the U -shaped bolt again. 7 replace cone crusher wall ‚ cone crusher crushing cone wall is fixed to the body with a conical head ‚ between two zinc alloy casting ‚ after a new installation or a new replacement cone crusher wall 6-8 hours should
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place. Independent- The time when Zinc powder is adedd to the water‚ and the amount of Zinc‚ and the water in the cup. Dependent- Change of Water temperature. Materials -Measuring Celinder-Copper Sulphate Solution ( 1M CuSO4) -Polystyrene Cup- Zinc Powder -Balance-Thermometer -Watch or a Clock with second hand- Safety Spectacles Procedure First‚ we measured 25 ml of Copper Sulphate Solution into a Polysterene Cup. Then‚ we weighed 6g of Zinc Powder on a piece of paper. We
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to your favorite music. We made a simple battery out of a potato by placing in it a zinc strip and a copper strip. At the zinc strip‚ the acid dissolves the zinc freeing electrons. At the copper strip‚ the acid uses those electrons to form hydrogen gas. Because the zinc strip frees electrons and the copper strip uses electrons‚ if you put a wire between the two strips‚ then electrons will flow from the zinc to the copper. This is electrical energy. The flow of electricity is called an electrical
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acidic solution. Copper and Zinc work well as the metals and the citric acid content of a lemon will provide the acidic solution. Batteries like this will not be able to run a motor or energize most light bulbs. It is possible to produce a dim glow from an LED. The picture at the top of this page shows a basic lemon battery‚ a lemon‚ copper penny and zinc coated nail. The lemon: A large‚ fresh‚ "juicy" lemon works best. The nail: Galvanized nails are coated in zinc. I used a 2" galvanized
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Tentative Syllabus HUNTER COLLEGE OF THE CITY UNIVERSITY OF NEW YORK CHEM 106 Sec: GENERAL CHEMISTRY I LAB Instructor: Emral Devany Tel: Email: edevany@hunter.cuny.edu Required texts: 1) 106 Lab Manual from Hunter Bookstore (10th Edition only) 2) Carbon Copy Lab Notebook Class Time: Mo- Wed 2:10-5:00 pm Room: Office: 1406C
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_____________________________CORRTECH CATHODIC PROTECTION FOR PORT FACILITIES _____________________________CORRTECH Contents • • • • • • What causes corrosion What is CP and how does it work? Galvanic vs. impressed current Electrolytes (or where can I use CP) Marine applications Condition assessments _____________________________CORRTECH What is Corrosion? Corrosion is defined as the degradation of a material due to a reaction with it’s environment. Metals require energy to process
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dissolving the zinc core and leaving behind the copper coating. We will figure out the percent composition from the mass of copper and zinc using titration and precipitation. Procedure: 1) First dissolve the zinc core of a penny and leave copper covering intact by applying four notches in the coin using a triangular file. 2) Place the penny in a 50 mL of a pre-determined concentration of HCl solution overnight. 3) Then determine the percent copper from the mass of copper. 4) Find the percent of zinc by precipitation
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OLD COINS TURN TO GOLD DESIGN: Problem or Research Question: How does zinc effects the color change in a copper penny? Hypothesis: If copper and zinc comes together‚ then it will form brass‚ which gives gold color to copper penny. Variables: There were no variables at this experiment PROCEDURES: Materials: Zinc (SN) filling‚ 3M NaOH solution‚ Copper penny‚ tongs‚ Hot plate‚ 100 ml beaker‚ 250 ml beaker‚ Bunsen burner‚ Water‚ Spoon. Procedure: First‚ we turned on the hot plate.
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Goggles * Nitric Acid * Fume Hood * 400 mL beaker * Tap water * Sodium Hydroxide * 25 mL graduated cylinder * Stirring Rod * Distilled Water * Heater * Tong * Sulfuric Acid * 100 mL graduated cylinder * Zinc * Hydrochloric Acid Observations: 1. Addition of nitric acid to copper: * Solution turns blue * Emits orange gas * Copper Nitrate is formed 2. Addition of sodium hydroxide to copper(II) nitrate: * Blue crystals liquefy
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