first collecting rainwater from selected rural and urban areas. After the collection was done‚ the rainwater samples were tested using a pH meter. The results of the pH test of rainwater in urban areas: in Novaliches‚ Quezon City‚ in Philcoa‚ Quezon City‚ in Katipunan‚ Quezon City‚ in Paco‚ Manila‚ and in Malate‚ Manila are between 6.08 to 6.10 The result of the pH test of rainwater in rural areas: in Iriga City‚ Bicol‚ in Buhi‚ Bicol‚ in Naga City‚ Bicol‚ in Calamba‚ Laguna‚ and in Biñan‚ Laguna
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UNIVERSITY OF CAMBRIDGE INTERNATIONAL EXAMINATIONS General Certificate of Education Ordinary Level CHEMISTRY Paper 1 Multiple Choice May/June 2005 1 hour Additional Materials: Multiple Choice Answer Sheet Soft clean eraser Soft pencil (type B or HB is recommended) 5070/01 w w w e tr .X m eP e ap .c rs om READ THESE INSTRUCTIONS FIRST Write in soft pencil. Do not use staples‚ paper clips‚ highlighters‚ glue or correction fluid. Write your name‚ Centre number and candidate number on the answer
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August 28‚ 2009 [PROBLEM SET FROM R. CHANG TEST BANK] 5. Calculate the pH of a buffer solution that contains 0.25 M benzoic acid (C6H5CO2H) and 0.15 M sodium benzoate (C6H5COONa). [Ka = 6.5 × 10-5 for benzoic acid] A. B. C. D. E. 6. A solution is prepared by mixing 500. mL of 0.10 M NaOCl and 500. mL of 0.20 M HOCl. What is the pH of this solution? [Ka(HOCl) = 3.2 × 10-8] A. B. C. D. E. 7. 0.97 3.10 4.40 3.70 4.30 Calculate the pH of a solution that is 0.410 M in HOCl and 0.050 M in NaOCl. [Ka(HOCl)
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Science Investigatory Project How to make a Biodegradable Plastic using cassava starch? ABSTRACT The study aims to produce biodegradable plastic using cassava starch as its main component. Cassava starch was mixed with water‚ epoxydized soya beanoil (ESBO)‚ glycerol‚ and polyvinyl alcohol (PVA). The mixture was then compressed and tested. Three preparations were made from the mixture. The first preparation contained 50 grams starch‚ 50 grams water‚ 50 grams PVA‚ 2.5 grams ESBO‚ and 2.5 grams
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INTRODUCTION: Carbohydrates are the product that made up from carbon‚ hydrogen and oxygen. Carbohydrates are form by the combination of carbon dioxide and water molecules. The carbohydrates contain two specific functional group in it which is the hydroxyl groups and carbonyl groups.A reducing sugar is a type of sugar with is an aldehyde group.This means that sugar can act as a reducing agent.The procces of reducing sugar is isomerisation‚example of reducing sugar islactose
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experiment was to determine the pH level of an unknown HCl solution. While doing so‚ we would also be receiving a good and fundamental understanding of how to use modern lab equipment to determine the chemical and physical properties of water bodies. Method: Make sure safety gear is always on and equipment is always clean. Part 1- Direct Analysis by pH Test Kit We grab a 50ml beaker and obtain a sample of unknown HCl as said to do in the procedure section in page 3. A pH test kit was provided
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Correlational Study of the Myers-Briggs Type Indicator and the Personal Need for Structure Personality Tests Abstract Correlational Study of the Myers-Briggs Type Indicator and the Personal Need for Structure Personality Tests There have been many uses for personality tests in psychological studies. They can serve as screens for participants‚ tools for determining possible causations‚ or even be the subjects of the studies themselves. Although there are several different types of personality
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20/04/2013 Pepsin Experiment Experiment protocol to test the effect of temperature on the enzyme pepsin Lab Day: Tuesday Lab Time: 10-1pm Are you in Lab G20 (furthest from BSB Student Office) or Lab G21 (closest to BSB Student Office)?: G20 Demonstrator Name: Tamsin Peters Names of Group Members: Roanna Humphries Daniel Markus Nicholle Cooke-Hayes Dean Do Rosario Pepsin Name of Enzyme You are Investigating: Table of Contents Table of Contents ........................
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Fluid‚ Electrolyte‚ and Acid-Base Balance: Introduction to Body Fluids 1. a. Where are fluids absorbed? ____________________ b. Where are excess fluids and electrolytes lost?____________________ 2. Name four of the six functions of water. a. b. c. d. 3. a. The amount of water in the body depends on the amount of ________________. b. From the CD‚ list the person with the highest and lowest percentage of water and give the percentage. 1. Highest ___________________ _______% 2. Lowest
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National Statistics Office. (2012). Accidents at work Q1‚Q2 2012. Valletta: National Statistics Office. Oxford Dictionaries. (2006). Oxford Dictionary of English. Oxford: Oxford University Press. Prichard‚ F. E.‚ & Lawn‚ R. E. (2003). Measurement of pH. London: Royal Society of Chemistry. Puddephatt‚ R. J.‚ & Monaghan‚ P. K. (1986). The periodic table of the elements. Oxford: Oxford Science. Rhee‚ S.‚ & Goldstein‚ M. H. (2009). Acid and Alkali Burns. In M. Yanoff‚ & J. S. Duker‚ Ophthalmology (pp
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