performed: October 2 - 3‚ 2012 Gravimetric Analysis of an Unknown Group 1 Metal Carbonate Purpose: The purpose of this lab is to determine the identity of a Group 1 metal carbonate compound by gravimetric analysis. Procedure: The unknown carbonate is weighed and then dissolved in water. A solution of CaCl2 (calcium chloride) is added to the metal carbonate solution to precipitate the carbonate ions as CaCO3 (calcium carbonate). The precipitate is then filtered‚ dried‚ and weighed again. Data: Equation
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good fit. Builder’s putty also mainly contains chalk as a filler in linseed oil. Chalk may be used for its properties as a base. In agriculture‚ chalk is used for raising pH in soils with high acidity. The most common forms are CaCO3 (calcium carbonate) and CaO (calcium oxide). Small doses of chalk can also be used as an antacid. Additionally‚ the small particles of chalk make it a substance ideal for cleaning and polishing. For example‚ toothpaste commonly contains small amounts of chalk‚ which serves
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neutralising soil; it is a sedimentary rock that is commonly found in quarries. It is a compound consisting of calcium‚ carbon and oxygen called calcium carbonate (CaCO3). As it is a solid it would be very hard to neutralise soil with it so it has to be broken down and made into a liquid form called calcium hydroxide (CaOH2) made up of calcium‚ carbon‚ oxygen and hydrogen. This calcium hydroxide can then be sprayed on the fields to neutralise the soil. Stings When we get stings e.g. wasp‚ bee
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using complexometric titration the hardness of a sample of water can be obtained. Methods To begin‚ a solution of 500 mL of disodium EDTA with a mean M of 0.00412 was prepared. Next‚ the disodium EDTA solution was standardized using 10.18 mL calcium ion stock solution (1.000g/CaCO3)‚ ammonia/ammonium chloride buffer‚ and Eriochrome Black T as an indicator. Then‚ using the standardized disodium EDTA solution‚ an unknown sample (#94) was titrated. Finally‚ the results were compared with that
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chemicals that get involved and added into the water as it travels. This relates to the hardness of water. The hardness of water is basically caused by the amounts of charged minerals in water. The two most significant ones are magnesium (Mg2+) and calcium (Ca2+)(1). Water is an excellent solvent and therefore easily picks up
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powerful water softener that stands up to its reputation‚ being a great choice when it comes to meeting a small family need. As you already know‚ the water that you receive in your home is hard water because it contains a lot of minerals‚ including calcium and magnesium. As such‚ using hard water in your home‚ will make you plenty of problems such as ugly stains on tubs and sinks. Since water appliances are forced to work harder‚ there will be higher water bills‚ as well. However‚ water softening devices
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sodium carbonate. Na2CO3 – reason for process Waste products - CaCl2‚ calcium chloride - Heat Chemical properties of the main product (Na2CO3) - Forms several hydrates which are used in many ways - It is moderately alkaline‚ so it can neutralise strong acids - Can precipitate many metal ions from solution as carbonates Uses of sodium carbonate - Glass manufacturing (most common use) o Used as a flux gas which lowers the melting point of the silicon dioxide and the calcium carbonate
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b) scurvy c) anemia d) night blindness 6.Which one of the following is reducing sugar? a) glucose b) maltose c) sucrose d) starch 7.Buildings are being damaged by acid rain because it attacks a) Calcium sulphate b) Calcium nitrate c) Calcium carbonate d) Calcium oxalate 8.Which one of the following salts makes water permanently hard a) Na CO b) NaHCo c) Ca(HCO ) d) CaSO 9.Concentration of the copper one is carried out by a) calcination b) roasting c) froth
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aim of the experiment is to find out the amount of calcium carbonate in toothpaste through back titration since calcium carbonate does not dissolve in water. A roughly weighed amount of calcium carbonate is mixed with hydrochloric acid and then titrated against sodium hydroxide. When the indicator turns from pink to orange‚ the volume of sodium hydroxide used is taken down. After doing some calculations‚ the average percentage of calcium carbonate in toothpaste is 19.2%. This average percentage is
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made mainly of calcium carbonate (CaCo3) Some types of limestone are made of the remains of tiny animals and plants which lived in the sea millions of years ago We dig limestone out of the ground in quarries Its main use is as a building material/ in the manufacture of iron Powdered limestone + high temperature+ sand+ sodium carbonate= glass powdered limestone + powdered clay + heat= cement cement powder + water + sand +gravel= concrete Limestone + strong heating= quicklime (calcium oxide) + carbon
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