"Calcium carbonate" Essays and Research Papers

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    developed to "soften" hard water; i.e.‚ remove the calcium and magnesium ions. Water can be softened in a number of ways. An automatic water softener connected to water supply pipes removes magnesium and calcium from water and replaces them with sodium. Sodium does not react with soap or detergents. If you don’t have an automatic water softener‚ you can still soften laundry water by adding softeners directly to the wash water. These softeners combine with calcium and magnesium‚ preventing the minerals from

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    exports sodium bicarbonate throughout the world from multiple plants in the United States and Brazil. Their subsidiary in Brazil also manufactures various inorganic chemicals‚ such as sodium sulfide‚ sodium sulfite‚ sodium metabisulfite‚ barium carbonate‚ barium sulfate and barium chloride. Environmental Scan: An external scan of their environment showed that one opportunity available

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    was completed using an approximately .7340g Na2EDTA/500mL solution. A 1.000g/L calcium ion solution was used as the primary standard with approximately 3mL of ammonium chloride as a buffer and Erichrome Black T as the indicator solution. Three titrations were performed to ensure accuracy of the molarity of the Na2EDTA solution. The 1.000g/L calcium ion solution had to be converted to M so 1g/L/100.1g=.009990M calcium ion solution. Titration 1: 10.00mL CaCO3; .00999MCaCO3X.0100L= .0000999mol CaCO3

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    Materials in Our Daily Life

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    Materials in Our Daily Life : 95 : 21 Materials in Our Daily Life The basic aim of science is not only to study and understand natural phenomena but also to use this knowledge to make our lives more comfortable. Science and technology have enabled us to develop more economical and convenient methods to recover useful materials from nature and to put them to various uses. Chemistry has enabled us to synthesize new materials which have desired properties‚ thus‚ making them even better than natural

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    Bone Lab Report Essay

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    because the bone is largely made up of calcium salts. The vinegar broke the calcium phosphate down‚ leaving only collagen left. As we learned collagen is flexible so this made the bone bended easily. Calcium gives bone its strength and durability. Each time I changed the vinegar I was dumping the extracted calcium out. This shows how much of an important role calcium plays‚ without it bones would be flimsy. It also reveals how the structure of bone‚ having calcium‚ allows it to function properly for

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    Calcinosis cutis is rare condition signified by calcium deposition in skin and subcutaneous tissues. In all cases of calcinosis cutis‚ insoluble compounds of calcium are deposited within the skin due to local and/or systemic factors. These calcium salts consist primarily of hydroxyapatite crystals or amorphous calcium phosphate. It is commonly seen in blacks‚ and no apparent gender predilection is noted (6‚7) From the pathogenesis point of view‚ the condition is classified as metastatic‚ dystrophic

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    Hard Water

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    Hard Water How can water be hard? Well‚ it can‚ but maybe not in the sense that one would think. Hard water refers to water with dissolved calcium and magnesium ions in it. Rainwater is naturally soft‚ but when the water runs through the ground or over rocks causing erosion‚ calcium and magnesium ions can be easily picked up. Most people prefer hard water to soft water for drinking‚ because the ions are good for you‚ and because soft water leaves a “dry” taste in one’s mouth (1‚2). Big businesses

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    swirl‚ dip a toothpick with water and thenn into the EDTA indicator powder. Then swirl the toothpick into the beaker Observation and Data Table: By finding the total hardness‚ I was analyzing the water sample for the combined concentration of calcium and magnesium ions. When making the buffer‚ the sample turned blue‚ allowing me to get a sense of what color I would be looking for later on in the experiment. I tested my tap water for the total hardness by adding EDTA solution through a titrator

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    hydrochloric acid of volume 25.0 cm3 was pipetted onto a piece of marble which is calcium carbonate. When all action had ceased‚ 1.30g of the marble had dissolved. Find the concentration of the acid Equation: CaCO3 + 2HCl  CaCl2 + CO2 + H2O 6. What volume of 0.1 moldm-3 hydrochloric acid would be required to dissolve 2.3 g of calcium carbonate? Equation: CaCO3(s) + 2HCl(aq)  CaCl2(aq) + CO2(g) + H2O(l) 7. 2.05 g of the carbonate of an unknown alkali metal (X2CO3) required 8.9 cm3

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    CHM130 LAB 5

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    Drain cleaner 2 Sodium hydrogen carbonate NaHCO3 Baking soda 3 Aluminum Oxide Al2O3 Sandblasting sand 4  Sodium hypochlorite NaClO Bleach 5 Aluminum sulfate AI2(SO4)3 Used in antiperspirant 6 Ammonium bromide NH4Br Used in photography 7 Ammonium chloride NH4CI Used in photography 8 Ammonium carbonate (NH4)2CO3 Smelling salts 9 Calcium carbonate CaCO3 Limestone/chalk 10 Sodium chloride  NaCI Table salt 11 Calcium chloride  CacI2 De-icer for snow on  roads 12 Calcium hypochlorite Ca(ClO)2 Swimming pool

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