Complexometric Determination of Water Hardness Lab Report Introduction: In this lab the use of disodium salt of EDTA is used to determine the concentration of M^2+ metal ion impurities in hard water by chelometric titration. The indicator Eriochrome Black T will help detect when you EDTA has completely chelated the metal impurities. Chemical Principle: A complex ion consists of a metal ion with Lewis bases attached to it. These Bases form strong covalent bonds with the central complex
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to provide a measure of the quality of water for household and industrial use. Hard water is not a health hazard. Drinking hard water contributes a small amount of calcium and magnesium towards humans dietary needs. Hard water is caused by metal ions (salts) being dissolved in the ground water. We measure hardness in water in terms of CaCO3 as the Ca2+ ion is greater than the concentration of any other metal. Hard water does cause soap scum‚ clog pipes and clog boilers. Soap scum is formed when
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solution by mixing a solvent with a solute. Pure water is neither acidic nor basic‚ but rainwater is slightly acidic; as it passes through mineral deposits‚ it reacts with the minerals for them to dissolve in water. When you wash dishes‚ if you have hard water you would need more soap to get the dishes cleaned. When measuring the hardness of water you can compare the measure of suds that form with liquid soap. Calcium and magnesium dissolved in water determines the hardness. Water hardness (mg/L)＝Ca(mg/L)×2
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HARD TIMES ASSIGNMENT DISCUSS: Dickens’ Coketown is not a city‚ rather a stage for the workings out of Gradgrind’s philosophy. Considering the above sentence examine the construction of the city in Hard Times. Coketown is quite literally the ‘town of coke’‚ the raw material used to convert iron to steel and indirectly the foundation of the ‘steel/industrial revolution’. It is critical to analyze the name of the city for Dickens’ Hard Times is a satirical caricature on the condition of England
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can be harder than others (1)Hard water is any water containing an appreciable quantity of dissolved minerals. (2) Some of the minerals come from chalk‚ limestone or marble‚ which the water may have flowed over or through. (4) Hard water contains calcium or magnesium ions. Limestone‚ marble or chalks are insoluble in pure water however they will dissolve slowly in acidic rain. If your water has emerged through limestone or chalk (calcium carbonate) it will be hard. (1) Soft water is gratification
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Name: Abeir Wasim Teacher Name: Mr.Ferguson Course Code: ENG-2D1 Due Date: Friday‚ December 2nd‚ 2011 Carrie Mac’s novel The Droughtlanders‚ is about twin brothers Seth and Eli Maddox. They are Keylanders brought up within the privileged and protected Eastern Key. Keylanders‚ the boys are told‚ must keep within their walls to avoid the filth and disease spread by the Droughtlanders-those who struggle to survive on the parched land between the Keys. But when Eli is introduced to an underground
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DIE HARD 4 SUMMARY Posted: Juli 25‚ 2011 in Others 0 Movie Title: Die Hard 4 Genre: Action Theme: Hackers attack Characters: Protagonists: John McClane (detective)‚ Lucy and Jack (daughter and son of John McClane)‚ Farrel Mathew (hacker)‚ Bowman (deputy director of FBI)‚ Johnson (FBI agent)‚ Warlock (Farrel’s friend)‚ Dennis (Lucy’s boyfriend)‚ Taylor (FBI agent). Antagonists: Thomas (terrorist leader)‚ Molina (terrorist/ Thomas’s henchman)‚ Mai (terrorist/ Thomas’s girlfriend)
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Wordsworth’s reaction against the industrial domination of nature is very similar to the thematic battle of "Fancy" vs. "Fact" in Charles Dickens’ Hard Times. This conflict is portrayed in Mr. Gradgrind’s method of forcing his educational ideals on his students. Mr. Gradgrind represents the Utilitarian principle of "maximum efficiency". He believes that "hard facts" and statistics are the only things of value. His system of education has no room for poetry or expression. He thinks that creativity and
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Aim: To compare the foaming capacities of five different commercial soaps. Apparatus: 5 test tubes‚ 5 conical flasks (100 ml)‚ test tube stand‚ Bunsen burner and stop watch. Materials Required: 5 different samples of soap and distilled water Theory: The foaming capacity of a soap sample depends upon the nature of soap and its concentration. This can be compared for various samples of soaps by taking the same concentration of solution and shaking them.The foam is formed and the time taken
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fallacies of Hard Times." Hard Times. Ed. Kaplan‚ Fred and Sylvère‚ Monod. New York: Norton‚ 2001. 347-351. This article by E. P. Whipple is called “On the Economic Fallacies of Hard Times” and was written in The Atlantic Monthly in 1877. It talks about how Dickens established a weekly periodical called Household Words. Four years later he began the publication of Hard Times that was completed in weekly installments until its finish. Household Words was doubled in length with the completion of Hard Times
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