"Chemical oxygen demand" Essays and Research Papers

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    Oxygen and Reaction

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    Observations: Part I: Reaction between iron and oxygen Appearance of steel wool after 20 minutes From (relatively) shiny metal strips to not-so-shiny strips that are stained with dark‚ reddish-brown stuff. Part II: Decomposition of hydrogen peroxide Appearance of potato and hydrogen peroxide combination: Lots of white‚ foamy bubbles around the potato slices. Day 2 Observations: Part III: Reaction between zinc and acetic acid Appearance of penny in vinegar after

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    oxygen cycle

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    Oxygen Cycle Required for Life  All living things use oxygen or depend on organisms that use oxygen in some way. All Animals and Other Consumers Use Oxygen  We use oxygen to break down simple sugar and release energy.  This can be done through respiration or fermentation.  Animals mainly use respiration. Respiration  The process that breaks apart simple food molecules to release energy.  It occurs inside cells.  What YOU do with the oxygen

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    Oxygen Sensor

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    Introduction: An oxygen sensor‚ or lambda sensor‚ is an electronic device that measures the proportion of oxygen (O2) in the gas or liquid being analyzed. It was developed by Robert Bosch GmbH during the late 1960s under supervision by Dr. Günter Bauman. The original sensing element is made with a thimble-shaped zirconia ceramic coated on both the exhaust and reference sides with a thin layer of platinum and comes in both heated and unheated forms. The most common application is to measure the

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    Water Pollution

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    suspended matters and even microbes. The presence of water pollutants alters the amount of dissolved oxygen and biochemical oxygen demand. Dissolved oxygen (DO) is the amount of oxygen present in the aquatic system that is available for aquatic life and is essential for sustaining the plant and animal life in any aquatic system. The Biochemical Oxygen Demand (BOD) is a measure of the oxygen required by aerobic micro-organisms to bio-chemically oxidize the organic matter present in the waste and

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    oxygen cycle

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    1. The Oxygen Cycle 2. What is oxygen? a. Oxygen is an element b. Colorless‚ odorless and tasteless gas c. Denser than air d. very poor conductor of heat and electricity 3. Picture. 4. Oxygen Cycle a. Step one i. Plants release oxygen into the atmosphere as a by-product of photosynthesis b. Photosynthesis c. Definition- The process in which green plants use the energy from the sun to make carbohydrates from carbon dioxide and water in the presence of chlorophyll 5. Steps to the photonthesis

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    Oxygen Sensor

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    Oxygen sensor invention could benefit fisheries to breweries | MSU News... 1 of 1 http://news.msu.edu/story/9168/ News Site Oxygen sensor invention could benefit fisheries to breweries Contact: Layne Cameron‚ University Relations‚ Office: (517) 353-8819‚ Cell: (765) 748-4827‚ layne.cameron@ur.msu.edu Published: April 04‚ 2011 E-m ail Editor ShareThis EAST LANSING‚ Mich. — Monitoring oxygen levels in water has applications for oil spills‚ fish farming‚ brewing beer and more

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    Ibalur Lake Case Study

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    meters. 1. Sampling method a. Physico-chemical and microbiological

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    Oxygen and Trees

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    the ground. Leaves absorb carbon dioxide from the air to form carbohydrates that are used in the plant’s structure and function. In this process‚ leaves also absorb other air pollutants—such as ozone‚ carbon monoxide‚ and sulfur dioxide—and give off oxygen. By planting trees and shrubs‚ we return to a more natural‚ less artificial environment. Birds and other wildlife are attracted to the area. The natural cycles of plant growth‚

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    Chemicals

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    covalent bond - A covalent bond is a chemical link between two atoms in which electrons are shared between them.  An Example: There is covalent between the oxygen and each hydrogen in (H 2 O). Each of the bonds contains two electrons - one from a hydrogen atom and one from the oxygen atom. Both atoms share the electrons.  Combination of silicon and oxygen - The combination of silicon and oxygen is similarly to carbon and hydrogen‚ silicon and oxygen form numerous compounds. They are commonly

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    Balancing: Oxygen and O2

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    Chemical Equations Name _____________________________ Balancing Balancing Equations Challenge Part A: Parts & Pieces (1) Circle each subscript in each chemical formula. (2) Draw a square around each coefficient. (3) Answer the questions related to each chemical formula. O2 CO2 5 H2 What element does the O represent? ___________________ How many atoms of each element are in the formula shown? C = ______ O = ______ How many atoms of Hydrogen are in this formula as shown

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