Chemistry Practical: Activity Series of Metals Introduction: The chemical activity of a metal is directly related to its practical use. In this investigation you will investigate the chemical activity of metals with oxygen‚ water‚ acid and alkali‚ to rank metals in order of their activity. Aim: To observe the reactivity of metals in order to determine the activity series of metals. Risk Assessment: In this investigation‚ hydrochloric acid solution is used which is toxic by all routes of
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Case Study Finance - EDHEC MBAUnited Metal | | Background We refer to the case in the finance textbook for the details. Throughout our efforts in determining the right decision for United Metal‚ our team decided to calculate the difference between the ‘Make’ or ‘Buy’ options‚ using the numbers given in the case. However‚ in order to determine the net present value (NPV) and make appropriate recommendations‚ a risk adjusted discount rate (rate-of-return or ‘r’) needs to be incorporated.
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concentrated‚ which was hard to identify the shape of the bacteria‚ while other sections were less concentrated and was easier to analyze the shape. The next step according to the result‚ will be a catalase test.
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Heavy metal contamination occurs though all facets of life such as air‚ water‚ food‚ soil‚ and in everyday objects and occurrences. When heavy metals enter the air from factories emissions and smoke‚ it is exposed to the body‚ which mostly affect your skin and lungs such as Cadmium and Arsenic. Common water contaminates are Chromium and Thallium‚ Chromium can enter the water source usually through spills and leaks from power plants. Thallium like other metals occurs naturally in water but some areas
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of depression such as a decline in energy‚ loss of interest in enjoyable activities‚ unintentional weight loss‚ and sadness (Jackson and Cates‚ 2016). An appropriate first line medication that could be prescribed is a specific serotonin reuptake inhibitor (SSRI) (Jackson and Cates‚ 2016). These medications usually require tapering when starting and stopping the medication. (Jackson and Cates‚ 2016). Furthermore‚ SSRIs are less sedating than many other antidepressants making the class a good option
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be affected by changes in something like temperature. A catalyst is a substance which changes the role or speed at which a reaction occurs. The catalyst in our experiment was the enzyme‚ catalase. An enzyme is a specialized protein which catalyzes reactions in cells. The enzyme in our experiment was catalase‚ which came from the potato juice. The function of an enzyme is to catalyze reactions in cells. The specific function of the enzyme in this experiment was to see if it affected the activity
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GOFFMAN‚ SCHEFF AND SCASZ ARGUE THAT MENTAL ILLNESS IS A SOCIAL CONSTRCUTION. Mental illness is a general term referring to psychological‚ emotional‚ or behavioural disorders as well to the view that these disorders are diseases of the mind. Because it’s more to do with the psychological aspect‚ methods of treatment are different from a physical disability. A physical disability may involve treatment like acupuncture and traditional medicine whilst a mental illness (disability) treatment involves
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the identity of the metals‚ I was capable of deducing a definite‚ possible identity for the golden metal‚ however‚ I could not provide a definite‚ possible identity for the silver metal. Conversely‚ the results of the experiment themselves‚ whether volume‚ mass‚ or density‚ proved insufficient in my attempts to distinguish the identities of the metals. Thus‚ during the experiment‚ I also observed the color of the metals‚ and used these observations in my assessment of the metals. The five trials for
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Title : THE EFFECT OF PH ON THE ACTIVITY OF CATALASE Aim : To study the effect of pH on the activity of catalase. Introduction : Catalase‚ an enzyme found in many different tissues‚ catalyses the breakdown of hydrogen peroxide into water and oxygen. 2 H202 → 2H20 + O2 Hydrogen peroxide is a toxic substance that can be formed during aerobic respiration and catalase removes this product. The activity of catalase can be measured by finding the rate of oxygen release from hydrogen peroxide
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Observations Materials: * Barium Iodide- White and powdery * Zinc Sulfate- White and powdery * Boiling Chips- Tiny‚ grey and rock like Experimental Observations: Barium Iodide used- .63g Zinc Sulfate used- .45g Boling Tube with 2 boiling chips- 41.52g Barium Iodide in solution with 2 mL of deionized water looks cloudy. Zinc Sulfate in solution with 2 mL of deionized water is clear. Barium Iodide solution mixed with Zinc Sulfate solution turns milky white. After first centrifugation‚ solution
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