"Hardness" Essays and Research Papers

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    Water analysis

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    conductivity‚ alkalinity‚ and pH‚ chloride‚ nitrate and hardness detection) on Logger Pro software. The purpose of this comprehensive lab is to determine the chemical properties of public drinking water found at four specific locations in the Toledo Ohio area. Students test the various properties of this drinking water by subjecting it to the following tests: pH tests‚ conductivity tests‚ total and phenolphthalein alkalinity tests‚ total hardness‚ chloride tests‚ and nitrates tests. With respect to

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    diamonds are transparent and brilliant. Another important physical difference is their hardness. The hardness of minerals is compared using the Moh’s Hardness Scale‚ a relative scale numbered 1 (softest) to 10 (hardest). Graphite is very soft and has a hardness of 1 to 2 on this scale. Diamonds are the hardest known natural substance and have a hardness of 10. Diamond is used as an abrasive because of its great hardness‚ whereas graphite is used as a lubricant. Structural Differences: Diamond

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    makes metals more ductile and malleable than it was in its original condition (“Annealing of Tool Steel”). After testing the hardness of the annealed specimen with a 3‚000 kg load‚ a 5.7 mm diameter indent was left on the surface‚ while the control had a 5.2 mm diameter indent. The hardness on the Brinell scale was HB 107 for the annealed specimen while the control had a hardness of HB 131. These results showed that the slow cooling of the steel softened the material. “Annealing”. Mamesta. N.p. N.d

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    alloy casting ball.  After quenching process‚ the hardness of high chromium alloyed casting ball must be more than 58 HRC and impact value 3.0 J/cm2‚ according to national standard and requirement.   Forging steel ball manufacturers made steel ball through direct heating and forging way. It doesn’t need smelting process. Compared with casting steel ball‚ chromium content is much lower‚ between 0.1% 0.5%. Carbon content is below 1.0%. surface hardness of forging steel ball canreach more than 56. Hardening

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    Boiler and Water

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    consume a lot of soap? 3. What is the difference between soft and sterilized water? 4. State chemical reactions‚ which remove bicarbonate hardness and justify your answer 5. Why is NH3-NH4Cl buffer added in the determination of hardness of water? 6. Discuss which of the following substances will increase‚ decrease or have no effect on the hardness of water: Ca (OH)2‚ Mg(HCO3)2‚ MgSO4‚ Ca(HCO3)2‚ CaSO4‚ CaCl2‚ KCl‚ NH4Cl‚ NH4OH‚ NH4)2CO3‚ Na2SO4‚ BaCO3‚ NaCl‚ NaOH‚ Na2CO3‚ Na3PO4

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    and Programming First of all‚ the specimen designs have been drawn using the AutoCAD software. Two design have been drawn which were specimen for the tensile test and also specimen for the hardness test. Figure 3.3 and Table 3.3 shows the tensile specimen design with measurement. Figure 3.4 shows the design hardness specimen design and measurement. Figure 3.3: Tensile specimen design Table 3.3: Tensile specimen measurement All values in mm Sheet type‚ 12.5mm Wide Gauge length 50 ± 0.1 Width

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    ice cream report1

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    Ice Cream Report 1. INTRODUCTION Ice cream is a complex colloidal system‚ which consists of air bubbles‚ ice crystals and fat globules. There are many formulation and [processing factors that influence the quality of ice cream. Stabilizer is such a factor‚ the function of stabilizer is to improve air incorporation‚ give body and texture‚ control meltdown of the ice cream(Keeney 1982).The aim of this report describes the procedure of manufacturing ice cream‚ and discuss what the

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    Mineral Worksheet

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    White White White White White Brown Luster Shiny Shiny specs Shiny Specs Dull Dull Shiny Shiny Shiny Specific Gravity 3.18 5.10 2.8 2.7 2.6 2.65 2.4 2.2 Cleavage & Fracture Cleavage Fracture Fracture Cleavage Fracture Fracture Cleavage Cleavage Hardness 4 6 3 3 6 6.1-10 3 1-2.9 Acid No Reaction No Reaction No Reaction Lots of bubbles Active Fizz No Reaction No Reaction No Reaction No reaction Part 2: Naming the Minerals Name the minerals in the following table. Then‚ insert a percentage of

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    Qwerty

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    Chemistry Laboratory Report Experiment #28: Hardness of Water Student: Assem Abichshayeva Lab. Partner: Marat Aitkhozha Dr.Brad Logsdon Date: 22.04.13 Purpose: The main purpose of this experiment is to standardize a solution of EDTA by titration against a standard solution made from calcium carbonate‚ CaCO3. Procedure: A 50-mL buret‚ a 250-mL volumetric flask‚ and 25- and 50-mL pipets were obtained from stockroom. The 0.5 g of calcium carbonate was weighted in a small 50-mL beaker.

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    Steel Making Methods

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    Steel Making Methods | Advantages | Disadvantages | Basic Oxygen Furnaces | * Very high production rates and low residual element * Does not burn fuel | * Good efficiency requires large amount of pig iron to continue production. * Requires costly filtering process due to high levels of pollutants produced. * High refurbishing costs. * High dependence on blast furnace/coking. | Electric Arc Furnaces | * Minimal emissions/pollution. * Filtering of scrap not necessary. * Easy

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