in water. Turbidity is the presence of suspended solids in water which reduces penetration of light‚ resulting in a decrease concentration of oxygen. Acidity is the concentration of hydrogen ions in the water body. A pH of 5.5-7.5 (meaning slightly basic water) is preferred in water supplies. Dissolved oxygen is the measure of oxygen dissolved in aqueous solution whilst biochemical oxygen demand is the measure of oxygen used by organisms. Both of these are monitored to prevent harm caused to bacteria
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Data-based questions Study the photos below and answer the following questions. Photo A Photo B Photo C (a) What are industries shown in photos A‚ B and C respectively? (3 marks) (b) Draw a diagram to illustrate the manufacturing system of the industry shown in photo A. (4 marks) (c) Describe and explain the characteristics of these three industries. (i) Photo A (3 marks) (ii) Photo B (3 marks) (iii) Photo C (in tradition) (3 marks) (d) How do personal factors affect
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LIVING WILL OF JOHN DAVID ROBINSON I‚ John David Robinson‚ willfully and voluntarily address this Living Will to my family‚ my physician‚ my attorney‚ my clergymen‚ and to all other persons whom it may concern. I. In the anticipation of decisions that may have to be made about my own dying‚ if at such a time I become terminally ill and unable to participate in the decision regarding my medical healthcare‚ I hereby willfully and voluntarily make known my desire that my dying should not be
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Assessing Personality Fill in the following boxes by identifying and describing three types of personality assessment. List a specific assessment‚ or the procedure for measuring this type of personality measure. Describe whether or not you think this is an effective method for measuring personality. Be sure to answer the question below the box. Save this document and type directly onto the document and into the boxes. The boxes will expand to accommodate what you write. Submit as an attachment
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Investigating Chemical Equilibrium (Experiment 19 A) Purpose: 1. to recognize the macroscopic properties of five chemical systems at equilibrium 2. to observe shifts in equilibrium concentrations as stresses are applied to the systems 3. to observe a shift in equilibrium concentrations associated with changes in temperature 4. to explain the observations obtained by applying Le Chatelier’s principle Materials Required: See page 209 Heath Chemistry Laboratory Experiments Procedure:
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or fritted-glass funnel Mother liquor- liquid from which a substance precipitates or crystallizes Filtrate- liquid that passes through the filter Slurry- suspension of solid in liquid Calcium ion can be analyzed by precipitation with oxalate in basic solution to form CaC2O4.H2O The precipitate is soluble in acidic solution because the oxalate anion is a weak base CaC2O4.H2O (calcium oxalate monohydrate ; MW = 146 g/mol) Equation: Ca2+(aq) + C2O42-(aq) CaC2O4.H2O Large‚ easily
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Atmospheric chemistry is a branch of atmospheric science in which the chemistry of the Earth’s atmosphere and that of other planets is studied. Environmental chemistry is the scientific study of the chemical and biochemical phenomena that occur in natural places. It can be defined as the study of the sources‚ reactions‚ transport‚ effects‚ and fates of chemical species in the air‚ soil‚ and water environments; and the effect of human activity on these. Environmental chemistry is an interdisciplinary
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how chemistry affects us today. Our entire universe is made up of matter which is constantly changing forms and evolving into other forms of energy. Most people have chosen to write their essay about how chemistry has played an important role in everyday life. The simple fact is that chemistry plays an important role in every person’s daily activities from the moment we’re born. Chemistry is the branch of science that deals with the structure of organic and inorganic matter( any substance or organism
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Investigating Aspirin Aims Synthesize my own aspirin Analyse the purity of my aspirin samples (aspirin and recrystallized aspirin) compared to commercial aspirin by use of analysing melting points‚ TLC plates and colorimetry tests Investigate how pH effects the rate of hydrolysis of aspirin Background theory Making my own sample of Salicylic acid (to then be converted into Aspirin) Salicylic acid (2-Hydroxybenzoic acid) can be made by hydrolysing methyl 2-hydroxybenzoate. Oil
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Basic Elements of windows 8 operating system.Basic Navigation- Start menu is been replace by start screen in Windows 8 operating system‚ where you log into system you will see Tiles on the screen‚ there are two type of tiles‚ Stagnant one where there is no activity seen live and other one is live Tile‚ where we get to see the live updates on the screen. How to activate live tiles—Right click on the tile‚ if the tile is compactable to be live updates‚ in the bottom a bar pops up where you get to
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