10 (a) State TWO respiratory diseases that may be caused by exposure to asbestos. (2) (b) Identify where asbestos is likely to be encountered in a building during renovation work. (6) 6 (a) Define the term `target organ’ within the context of occupational health. (2) (b) Outline the personal hygiene practices that should be followed to reduce the risk of ingestion of a hazardous substance. (6) 3 (a) Explain the meaning of the term `dilution ventilation’. (2) (b)
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of 7 (wyzant.com‚ Feb. 12). NaOH is also known as caustic soda‚ it is soluble in water‚ ethanol‚ and glycerol but is insoluble in acetone and ether (nap.edu‚ Feb. 12). When Phenolphthalein a weak acid and when hydroxide ions (NaOH) is added the indicator is turned pink (Chemguide.co.uk‚ Feb.12). The objective was to titrate a solution of Citric acid and Phenolphthalein‚ with a base‚ (NaOH)‚ in order to determine the concentration of the base through qualitative and quantitative observations.
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to accurately observe the effects of titration on an acid and a base? Hypothesis: 1.If we add 18 mL of titrant to the flask containing the vinegar and indicator (phenolphthalein)‚ then the endpoint of titration will be reached‚ causing the solution to turn pink. 2. If we add 14 mL of titrant to the flask containing HCI and the indicator (phenolphthalein)‚ then the endpoint of titration will be reached‚ causing the solution to turn colorless. II. Data Table 1: Acid or Base in household cleaner
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Sterilization by Saturated Steam Mukul Bhatnagar: 21464987 Group Members: Chiew See Hau‚ Daryl Picard‚ Niamh Meagher‚ Musawwir Miriah Introduction Through the course of an entire day‚ an average human will come into contact with millions of different bacterial species. Just as human exposure to these bacterial species is high‚ the utensils we commonly use are subjected to a similar degree of exposure. Generally the temperature required to destroy many species of
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ACID BASE TITRATION OBJECTIVES 1. To demonstrate the basic laboratory technique of titration 2. To learn to calculate molarity based on titrations INTRODUCTION Molarity (M) or molar concentration is a common unit for expressing the concentration of solutions. It is defined as the number of moles of solute per liter of solution (or millimoles of solute per milliliter of solution). The concentration of a basic solution can be determined by titrating it with a volume of a standard acid solution (of
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No Airport? No Runway? No Problem! The Next Generation “Super Goose” by Antilles Seaplanes LLC Antilles Seaplanes Model G-21G Specifications & Descriptions Exhibit A Page 1 of 17 General Description All information herein applies to the Antilles Seaplanes Model G-21G “Super Goose” - a high wing‚ twin turbine powered‚ ten-seat‚ amphibious airplane. Certification Information Manufacturer & Model Number Antilles Seaplanes G-21G Name “Super Goose” FAA Type Certificate Date Sheet Approved Operations
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Experiment 4: ACIDS AND BASES: PH Measurements and Macroscale Titration CHM023L – A12 Group no. 6 Members: | Contributions: | | Conclusion | | Recommendation | | Tables and figures with analysis | | Principles‚ Equation | | Abstract‚ tables | Date Performed: February 28‚ 2012 - Tuesday Date Submitted: March 6‚ 2012 - Tuesday Submitted to: ------------------------------------------------- ABSTRACT: This experiment introduces us the pH measurement and application of macroscale titration
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Exercise 6: Acid-Base Titrations Nick Redmond Partner: Stephan Villavicencio Thurs. Section Lab date: March 19‚ 1998 Report date: April 6‚ 1998 Abstract: The equilibrium between acids and bases during a titration can be used to determine several characteristics of the acid or the base. Sodium hydroxide was standardized to 0.1035 M in three acid-base titrations of potassium hydrogen phthalate (KHP). This standardized NaOH solution was then used in a series of other titrations with acids
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source of carbon‚ Simmon’s citrate agar was used as the medium on which the bacteria was grown. The Simmon’s citrate agar consists of sodium citrate as the source of carbon‚ ammonium dihydrogen phosphate as the source of nitrogen along with pH indicator such as bromothymol blue. Procedure: The Citratase activity was detected by inoculating the unknown bacteria on the slant surface of Simmon’s citrate agar. Followed by overnight incubation at 37°C. Day after the slant was observed for a change in
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LAB 9: DATE: 25TH January‚ 2011. FORM CLASS: L6 3 SUBJECT: Biology TITLE: Enzymes AIM: To investigate the effect of temperature on the enzyme lipase INTRODUCTION: The phenomenon of catalysis makes possible biochemical reactions necessary for all life processes. Catalysis is defined as the acceleration of a chemical reaction by some substance which itself undergoes no permanent chemical change. The catalysts of biochemical reactions are enzymes and are responsible for bringing about almost
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