Equations: 1) Cu + 4H+(aq) + 2NO3-(aq) Cu2+ + 2NO2 + 2H2O 2) Cu2+(aq) + 2-OH(aq) Cu(OH)2 3) Cu(OH)2 + heat CuO + H2O 4) CuO + H2SO4 Cu2+(aq) + SO42-(aq) + H2O 5) Cu2+(aq) + Zn Cu + Zn2+(aq) Stage 1- Dissolution of Copper Mass of vial & copper = 3.537g Mass of vial = 2.505g Mass of Copper = 1.032g Moles of copper = mass (g) ÷ (63.5g/mol) = 0.0162 mol (3s.f) Copper description: Initially‚ the copper was a solid that was
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Presentation Pressure Die Casting Sam Mande Deepak Ch Veera Pratap Vamsi raj J (BUB0912011) (BUB0912016) (BUB0912013) (BUB0912010) M. Sc. (Engg.) in Engineering Manufacturing and Management Module Leader : Dr N S Mahesh M. S. Ramaiah School of Advanced Studies 1 History Casting since about 4000 BC… Ancient Greece; bronze statue casting 450BC Iron works in early Europe‚ e.g. cast iron cannons from England 1543 2 M. S. Ramaiah School of Advanced Studies Introduction
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Cements Acid-base rxn cements Resin-based cements Phosphoric acid Organometallic chelate Polyalkenoic compound acid Zinc phosphate ZOE Polycarboxylate Glass ionomer compomer Silicate conventional composite Zinc silicophosphate resin-modified Cement | Composition | Setting rxn | Properties | Uses | Adv | Disadv | Zinc phosphate(ZP) | Powder: ZnOLiq: Phosphoric acid | 3Zn + 2H3PO4 Zn3(PO4)2 + H2O-s/f of ZnO dissolved by acid to give insoluble phosphate-set
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nitrate‚ KNO3 nitric acid‚ HNO3 trisodium phosphate‚ Na3PO4 sodium thiocyanate‚ NaSCN sulfuric acid‚ H2SO4 distilled water‚ dH2O B. Apparatus test tubes iron ring 250-mL beaker iron stand bunsen burner C. Others iron nails copper strip sand paper zinc strip pliers 2 III. Procedure A. Reactions of Iron with various Aqueous Solutions In determining the reactions of iron immersed in various aqueous solutions‚ three set-ups were made‚ each consists of four test tubes with iron nails
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PHARMACEUTICAL CHEMISTRY Chapter 5 – Gastrointestinal Agents • Inorganic agents used to treat gastrointestinal disorders includes: 1. Products for altering gastric pH 2. Protectives for intestinal inflammation 3. Adsorbents for intestinal toxins 4. Cathartics of laxatives for constipation ANTACIDS o neutralize excess hydrochloric acid o inactivate the proteolytic enzyme‚ pepsin o alkaline bases Results of Hyperacidity: o Gastritis – inflammation of the gastric mucosa o Peptic ulcer
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of the experiment * Aim: To observe the reactions of sulfuric acid as an oxidising agent and as a dehydrating agent. Equipment: * 20mL of concentrated sulfuric acid * 20mL of 2mol/L sulfuric acid * 2 small pieces of each of copper‚ zinc and iron * Sandpaper * 10 test tubes * Test tube rack * 2g of sugar crystals (sucrose) * 2 wooden ice-cream sticks * 10mL measuring cylinders Steps: A: Sulfuric acid as an oxidising agent 1. Clean pieces of metal with
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Copper Hydroxide(s)—Cu(OH)2. For the third reaction‚ 90 drops of H2SO4 from the pipet was introduced to the Copper Hydroxide(s) to create an acid/base neutral reaction to form Copper Sulfate(aq)—CuSO4(aq). Fourthly‚ lab group 6 slowly added granules of Zinc (Zn) to the Copper Sulfate until the reduction method took place and therefore produced metallic copper(s) within the beaker. The excess
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reaction of the permanganate (MnO4-) ion in different media. Group 2‚ those on Part B‚ were set-ups that were done in order to study the reaction of Fe(SCN)2+ ion with that of elemental zinc. While the last‚ Group 3‚ those on Part C were set-ups that investigated the reaction of Fe4[Fe(CN)6]3 with that of elemental zinc. Group 1‚ test tubes A to C‚ vary greatly from each other. This is probably because they differ in the medium used for the reaction to took place. In test tube A‚ brown precipitate
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For an object pulled or pushed horizontally‚ the normal force - N - is simply the weight: N = m g (2) where m = mass of the object (kg‚ slugs) g = acceleration of gravity (9.81 m/s2‚ 32 ft/s2) Frictional Coefficients for some Common Materials and Materials Combinations Materials and Material Combinations Static Frictional Coefficient - μs Clean and Dry Surfaces Lubricated and Greasy Surfaces Aluminum Aluminum 1.05 - 1.35 0.3 Aluminum- bronze Steel 0.45 Aluminum Mild Steel 0.61 Brake material
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Solder (/ˈsoʊldə/‚[1] /ˈsɒldə/[1] or in USA /ˈsɒdər/[2]) is a fusible metal alloy used to join together metal workpieces and having a melting point below that of the workpiece(s). Soft solder is typically thought of when solder or soldering is mentioned‚ with a typical melting range of 90 to 450 °C (190 to 840 °F).[3] It is commonly used in electronics‚ plumbing‚ and assembly of sheet metal parts. Manual soldering uses a soldering iron or soldering gun.Alloys that melt between 180 and 190 °C (360
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