EXPERIMENT 11: DETERMINATION OF DISSOLVED OXYGEN IN A WATER SAMPLE (WINKLER METHOD) INTRODUCTION In an alkaline solution‚ dissolved oxygen will oxidize manganese(II) to the trivalent state. 8OH-(aq) + 4Mn2+(aq) + 2H2O(l) －－＞ 4Mn(OH)3(s) The analysis is completed by titrating the iodine produced from potassium iodide by manganese(III) hydroxide. 2Mn(OH)3(s) + 2I-(aq) + 6 H+(aq) －－＞ 2Mn2+(aq) + I2(aq) + 6H2O(l) Sodium thiosulphate is used as the titrant. Success of the method is critically
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fresh water to arid regions in the world. Located in a semi-arid zone‚ South Africa is one of the thirty driest countries in the world with limited water resources‚ which are unevenly distributed. In this country‚ five million people of the population have no access to safe drinking water and nearly fifteen million lack basic sanitation. The lack of drinking water is a serious problem‚ since there are more than 1.6 million children under five years whom die every year worldwide.(the water project
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and fish all need water to survive. Most of you probably prefer to drink coffee‚ soda‚ or other beverages opposed to water‚ but how many of you drink water on a regular basis? Today‚ I’ll be talking about the importance of drinking water daily by looking at what water does for our bodies‚ the benefits that come with drinking water and a few methods to help you drink more. I myself am an avid H2O drinker. It’s pretty much all I drink. Let’s start by looking at how important water is and what it
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Team Presentation and Team Analysis Assignments (265 Points Total) You are a member of a research team employed by Travel International. Your team specializes in preparing executives for successful business interactions in foreign countries. Your excellent reputation is founded upon your thorough knowledge of destination countries and their cultures and your detailed and engaging pre-trip presentations. Develop a 15-25 minute pre-trip presentation for business executives traveling to a country
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P5- Explain dysfunction in relation to water balance and its possible treatments. M3- Discuss dysfunctions in relation to water balance and its possible treatments. For P5 and M3‚ I am going to explain the dysfunctions that relate to the balance between water intake and the disturbance of water output. Then I am going to discuss it in more detail. Oedema‚ also known as dropsy‚ is one of the dysfunctions and this is when there is too much fluid retention in the body. In other words‚ the accumulation
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Ryan Fleckner Bosco 2/25/13 Sports Marketing One way a team advertises‚ especially to come to its games are by setting up promotion days. An example of this can be a team like the New York Mets. As I have printed out the different days with what the Mets will be promoting and an example for this can be on Sunday‚ April 21 the Mets will face the Nats at Citi Field at 1:10 pm and the first 25‚ 000 fans will get a Ron Darling All-Star bobblehead doll and it’s presented by Citi.
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How does water temperature affect the amount of dissolved oxygen? Ⅰ. Introduction Dissolved oxygen is just one of the many ways to measure water quality. It means the volume of oxygen that is contained in water. The amount of dissolved oxygen in water usually determines the quantity of organisms living in that water. Dissolved oxygen levels vary by how much oxygen the water can hold‚ how much oxygen is produced by photosynthesis‚ and how much oxygen is consumed by respiration. If water is too warm
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To B.I.Publications Sultan bazaar‚ Hyd Dear Sir‚ As per our telephonic conversion ‚ we have in furnishing our purchase order for the supply of Books lists. S. No. | Name of the Book | Author | Vol Edi | Publications | Req.Books | 1 | Enjoying everday English | Published by sangam books | | Sangam publications | 20 | 2 | Inspiring speeches and live | Maruthi publications | | Maruthi publications | 20 | 3 | Engineering mathematics | P.B Baska rao | | | 10 | 4 | Engineering
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The Hartnell Governor Stationary steam engines‚ traction engines‚ portable and semi-portable engines all require some method of steam regulation to enable the operator to maintain adequate control over the machine. A device known as a governor is the piece of equipment used for this purpose. Numerous types of governors have been designed and put into use. It is widely accepted that the Watt governor may be one of the oldest‚ if not the oldest‚ design which can still be found in use on numerous applications
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human activity in watersheds affect the water quality of lakes? Water is a vital resource that sustains all living things. In Michigan‚ people value this abundant resource and are attractive to the thousands of inland lakes which provide aesthetic‚ as well as recreational opportunities throughout the year. The health of our lakes is directly impacted by the amount of recreational use they receive‚ shoreline development‚ and water quality. Water quality covers many aspects of lake chemistry
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