Back Titrations Question 1 A 10.0 g piece of rusty steel wool is dissolved in 200.00 ml of 1.00 M sulfuric acid. The excess sulfuric acid is determined by titration with a 0.500 M sodium hydroxide solution. 300.00 mL of sodium hydroxide is required to neutralise the acid. What was the % purity of iron in steel wool? Question 2 A 3.145 g sample of a certain lead ore containing lead(II) carbonate‚ PbCO3‚ was heated gently with 25.00 mL of nitric acid of concentration
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Epsom salt have many uses‚ including use as bath salts‚ as a laxative and as a plant nutrient. Epsom salt contains hydrated magnesium sulphate which has the formula MgSO4.xH2O. Experiment to find the value of x in a pure sample of hydrated magnesium sulphate. The method i will use is heating a known mass of magnesium sulphate to remove the water of crystallisation. x is found by weighing before and after heating to find the mass of the water then using the moles calculations to find x. The source
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This paper argues on both theoretical and empirical grounds that‚ beyond a certain point‚ there is an unavoidable conflictbetween economic development (generally taken to mean ’materialeconomic growth’) and environmental protection. Think for a moment of natural forests‚ grasslands‚ marine estuaries‚ salt marshes‚ and coral reefs; and of arable soils‚ aquifers‚ mineraldeposits‚ petroleum‚ and coal. These are all forms of ’natural capital’ that represent highly-ordered self-producing ecosystemsor
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Question 1 What are probable sources of acid precipitation in your community? What impact can this have on the environment in your region? Some of the probable sources of acid precipitation is Fog‚ and rain. During the summer it hardly rains which makes it hard for our crops to grow‚ also since we are in the valley it makes it hard for us to get the water that we need. During the fall it gets very foggy in the mornings and it makes it very difficult to see while your driving. Prevailing
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a rain or any other form of precipitation that is unusually acidic‚ meaning that it possesses elevated levels of hydrogen ions (low pH). It can have harmful effects on plants‚ aquatic animals and infrastructure. Acid rain is caused by emissions of sulfur dioxide and nitrogen oxide‚ which react with the water molecules in the atmosphere to produce acids. The most obvious environmental effect of acid rain has been the loss of fish in acid sensitive lakes and streams. Many species of fish are not
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Professor: Robert Flinn April 11‚ 2014 Cause and Effect Essay: Acid Rain Acid rain is a rain or any other form of precipitation that unusually acidic‚ meaning that the level of pH is below 7. Acid rains can happen due to the emission of sulfur dioxide and nitrogen oxide‚ which it reach to water molecules in the atmosphere to form acids. Acid rain is resulting from natural phenomena‚ and human activities‚ which has a bad affected to the surface water and aquatic animals- the animal that
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and generated 21‚551 million kilowatt-hours of electricity. During 1990‚ Bowen plant emitted over 30 tons of sulfur dioxide per hour‚ an important precursor of acid rain. In 1990‚ Congress passes the Clean Air Act that aimed at controlling acid rain. As per the Clean Air Act‚ beginning 1995 (Phase 1) all the coal-fired utility plants would be receiving allowances to emit 2.5 pounds of sulfur dioxide per million British Thermal Units (MMBtu) of coal consumed. In the year 2000 (Phase 2)‚ all coal-fired
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amendments of 1990 regulate the emissions of sulfur dioxide starting in 1995. The intention of this legislation is to control the formation of acid rain. Between 1995 and 1999‚ the Bowen plant will receive allowances to emit 254‚580 tons of sulfur dioxide per year. Starting in 2000‚ the Bowen plant will receive allowances to emit 122‚198 tons of sulfur dioxide per year. To comply with the law‚ the Bowen plant will either have to reduce its emissions of sulfur dioxide to below the amount for which it
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it. Sulfur dioxide and nitrogen oxide are the gases that form the acid rain. When these gases mix with moisture it can make rain‚ snow‚ hail‚ or even fog. The scientific term for acid rain is acid deposition which means when the acid is taken from the air and is deposited on the earth. Major industries‚ coal burning factories‚ power plants and automoble engines are the main sources of sulfur dioxide and nitrogen oxide which caues acid rain. Volcaneoes and forest fires also causes sulfur dioxide
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damage to the ears. Firecrackers when burnt release a large amount of very tiny toxic particles that can easily enter our lungs and damage the respiratory system. The smoke from firecrackers contain sulfur compounds‚ heavy metals and other toxic chemicals and harmful fumes of gases such as sulfur dioxide‚ ozone etc‚. People with asthma‚ multiple chemical sensitivity and other breathing problems suffer largely due to the toxic emissions from these fireworks. Crackers are unnoticeably affecting
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