bills will be high because your water pipe has a leak. These are just some of the problems we encounter in our houses‚Primary cure to this problems are sealants.Oyster isn’t just any seafood its shells has avery useful usage.Oyster shells has a calcium carbonate and silicate;the shells also contains many other ingredients including Aspartic acid‚Glycine‚Serine and a whole lot more.Sealants can also be made out of oyster shells‚sealants are viscous material that has little or no flow charecteristics and
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Describe how the presence of substances in the table above: copper(II) sulfate‚ iron(II) sulfate and cobalt(II) chloride) change rate of the reaction. Unit 2 learning Aim C – How fast is your reaction? – Part 4 Chemical equation calcium carbonate + hydrochloric acid calcium chloride + carbon dioxide + water CaCO3(s)
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in accordance with Edexcel Limited copyright policy. ©2011 Edexcel Limited. Printer’s Log. No. Turn over N36637A W850/U7081/57570 5/5/5/ *N36637A0120* Leave blank Answer ALL the questions. 1. Complete the table. Name of compound calcium bromide NH4NO3 sodium sulphite copper(I) oxide PbO2 iron(III) sulphate Q1 (Total 6 marks) Formula of compound 2 *N36637A0220* Leave blank 2. Complete the following statements by inserting the missing colours. (a) When water is added
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found in the laboratory are hydrochloric acid‚ sulphuric acid and nitric acid. 3. Alkalis taste bitter and feel soapy or slippery. 4. The common alkalis found in the laboratory are sodium hydroxide solution‚ potassium hydroxide solution‚ calcium hydroxide solution and ammonia solution. 10.2 Acid-Alkali Indicators 1. An acid-alkali indicator shows different colours in acids and alkalis. It can be used to test acids and alkalis. 2. Natural indicators can be made from some deeply coloured
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Design Lab #17: Reaction Rate - Calcium Carbonate & Hydrochloric acid Design D: Introduction: In this experiment calcium carbonate will be put into a flask and mixed with hydrochloric acid to produce calcium chloride‚ water and carbon dioxide. The formula for this reaction is: CaCO3(s) + 2HCl(aq) → CaCl2(aq) + CO2(g) + H2O(l) Purpose: The purpose of this experiment is to determine how the surface area of CaCO3(s) affects the rate of
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Brian Jones Melanie Raite Biology 1103 November 3‚ 2012 DDT and Its Effects on Peregrine Falcons The Peregrine Falcon (Falco peregrinus)‚ or Duck Hawk‚ is a medium-sized raptor weighing 2 to 2 ½ pounds. These remarkable birds of prey measure 15-21 inches and have a wingspan of about 3 ½ feet. Their name‚ Peregrine‚ comes from the Latin word peregrinus‚ which means “to wander”. The name fits‚ given that they have one of the longest migrations in North America and are found on every continent
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solutions of lead (II) chloride and sodium chromate react to yield solid lead (II) chromate and aqueous sodium chloride. 3. Write the chemical equations for the following reactions. a. When heated‚ solid calcium reacts with solid sulfur to produce solid calcium sulfide. Δ Ca (s) + S (s) → CaS (s) b. Hydrogen gas reacts with fluorine gas to produce hydrogen fluoride gas. H2 (g) + F2 (g) → 2 HF(g) c. Solid aluminum metal reacts with aqueous
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only tolerate a narrow range of acid/base in the soil. For example‚ azaleas grow best in acidic soils‚ where beetroot thrives in slightly alkaline soils. One way to test this is to place a thin layer of white powder‚ such as barium sulfate or calcium sulfate‚ on the top of moist soil. Then place a few drops of universal indicator on it. The powder absorbs moisture from the soil‚ allowing the colour of the indicator to be clearly seen. • 2. ACIDS IN THE ATMOSPHERE Identify natural and industrial
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ANALOGUE: Nuts and Bolts Table 4.2. Mass of nuts and bolts Mass of nuts (g) 4.126 Mass of bolts (g) 24.176 Mass of nut-and-bolt pairs 14.000 Table 4.3. Summary of results on nuts and bolts. B. THE TARGET: Reaction of Sodium Carbonate and Calcium Chloride. Table 4.4. Observations from the reaction between Na2CO3 and CaCL2. Sample Observations Na2CO3 solution COLORLESS CaCL2 solution COLORLESS Na2CO3 + few drops of CaCL2 Produced a cloudy‚ white mixture After Filtration Precipitate
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Calcium Junior Fiscal Year 2012 Marketing Plan Developed by Dr. Mohammad Mujahidul Islam NSU ID: 1130201090 Riad Bakht Chowdhury NSU ID: 1130177590 Mohammad Salim Akhtar Khan NSU ID: 113047090 Mohammad Saifuzzaman NSU ID: 1130232090 Md. Mustafizur Rahman Khan NSU ID: 1010827090 Developed December 25‚ 2011 MEDIWORLD PHARMA LTD. Mediworld Pharma Limited Table of
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