Abstract: Introduction: Materials: * Chemicals: Buffer solution‚ pH 7.0‚ 50 mL Phenolphthalein indicator solution‚ 1.0 %‚ 1 mL Potassium hydrogen phthalate‚ KHC8H4O4‚ 2 g sodium hydroxide solution‚ NaOH‚ 0.1 M‚ 150 mL Unknown weak acid‚ 1.5g Water‚ distilled or deionized * Equipment: Balance Stir bar Beaker‚ 250mL Oven Buret‚ 50 mL pH sensor Desiccator Rising stand and buret clamp Erlenmeyer flask‚ 125mL Wash bottle with distilled water Funnel Weighing dishes‚ 2
Free PH Sodium hydroxide
INTRODUCING WITH BIOCHEMICAL CYCLES Biochemical cycles Nutrients are important for organisms to function. Each nutrient has a role in global biogeochemical cycles. A nutrient is a chemical that organisms need to live and grow and are substances an organism’s uses for metabolism which must be taken in from its environment that enrich the organism. Two types of nutrients are macronutrients and micronutrients. Macronutrients are needed in large quantities while micronutrients are needed in smaller
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Introduction to Acids Base chemistry Purpose How to determine the constant equilibrium of an acid‚ Ka? How to evaluate the concentration (M) of an acid? In “part A” experiment‚ we would test the PH of different concentration of acetic acid (a weak acid which partially dissociated in water) with a PH probe. After we got the PH‚ we could find out the concentration of H+ by applying the relationship pH = -log [H+]. Having the determined value of [H+] of a weak acid with a known molar concentration
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The full strength 1M HCl acid had a pH level of 3.12 (Table 3.1). Sample A2 to A4 remained in the pH 3 level‚ while sample A5 and A6 had a pH range of 4 (Table 3.1). The pH level for 1M HCl dilutions slightly increased between each sample (Table 3.1). The diluted solutions of 1 M NaOH showed a few unexpected results. The original solution of 1 M NaOH was at a pH level of 11.50 (Table 3.1). However‚ the pH of sample B2 increased to 12.81 (Table 3.1). The remaining samples had a decreasing pH pattern
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EXECUTIVE SUMMARY … … … … … … … … … … … … … … … … … … … … … … … … … … (Page 3 - 4) ISSUE IDENTIFICATION … … … … … … … … … … … … … … … … … … … … … … … … … … (Page 4) ENVIRONMENTAL & ROOT CAUSE ANALYSIS … … … … … … … … … … … … … … … …. (Page 5 – 8) RECOMMENDATION (S) AND IMPLEMENTATION… … … … … … … … … … … … … … … (Page 9) MONITOR & CONTROL … … … … … … … … … … … … … … … … … … … … … … … … … … (Page 10) CONCLUSION … … … … … … … … … … … … … … … … … … … … … … … … … … … … … … (Page 10) REFERENCES
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Apollo Accounting and Control Systems: Purchasing and Expenditure Cycle The employee prepares a purchase requisition and has a supervisor approve it. The supervisor retains Copy 2 of the pre-numbered purchase requisition for the department‚ sends Copy 1 to the Purchasing Department and Copy 3 to Accounts Payable. When the Purchase Department receives the purchase requisition‚ they search the approved vendor list and consult the listed prices for the goods desired for each vendor. Once a vendor
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Explain the difficulties that developing nations experience as they try to break the poverty cycle Global communications‚ advancements in technology‚ and space exploration have all created an interconnect webs between the nations and a false illusion that the world is moving forward and together as a whole. As much as humans like to think they are making progress in global society‚ the real truth is as the developed countries were getting richer‚ the developing ones were getting poorer and poorer
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departments has declined and hospital inpatient capacity has decreased as well. This is why managing the flow of patients through their care is vital in preventing patient crowding‚ patient safety issues and quality of care. Deming’s "PDSA" cycle examines a four-step process for quality improvement. The four steps are simply Plan‚ Do‚ Study‚ and Act. Based on the four-step model‚ I would implement an improvement in the flow of patients from the emergency room of a hospital to admittance in
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concentrated sulphuric acid at the chemical plant where I work at as the Safety Engineer. In this report‚ I will explain what Sulfuric Acid is‚ the health risks and hazards associated with it‚ the safety precautions that should be taken and how the spill should be handled. Sulfuric Acid‚ H2SO4‚ also commonly known as battery acid or vitriol‚ is one of the top products in the chemical industry‚ with 40 million tons produced annually in the U.S. It is a colourless‚ odourless and oily mineral acid that is soluble
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Astronomical Cycles and Their Effects on Planet Earth By Harry Mowat The orbit of the Moon around the sun The Moon orbits around the Earth every 27.3 days. The Moon’s orbit around the Earth is not a circular orbit but more of an eclipse and the orientation or the orbit is not fixed but differs in time. The Earth and the Moon are both actually orbiting the sun (the Moon at a much faster rate) but in the process of that orbit the Moon orbits Earth. This process is the main cause of tide formations
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