w w ap eP m e tr .X w Paper 3 Practical Test CONFIDENTIAL INSTRUCTIONS 5070/03 May/June 2004 Great care should be taken that any confidential information given does not reach the candidates either directly or indirectly. INSTRUCTIONS TO SUPERVISORS Teachers responsible for the examination are NOT allowed to consult the question paper before the day of the examination. However‚ they are asked to carry out a titration between solutions P and Q‚ to ensure that the concentrations
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pH and Chromatography Lab Report Kevin Rivera Biology Mr. Langley 2C 10/7/13 Introduction In this lab‚ of pH and Chromatography‚ in the pH aspect of the lab we are trying to figure out the pH level of certain chemicals by writing down of known solutions to find the type of unkown solution using pH standards. In the Chromatography‚ we are trying to separate the chemicals using water and a piece of paper. Methodology Materials: Safety Goggles pH indicator & pH indicator key
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| 10/19/2011 | | | | How to Make Litmus Paper English Lesson: Procedure | | | | | | Dianne Anderson from class 7-3 | How to Make Litmus Paper English Lesson: Procedure Litmus paper is a paper that can indicate the level of acid or base of some substances. Litmus paper usually made from absorbing paper that contains red cabbage essence. Litmus paper is commonly used in school and university laboratory. Below are the steps how to make Litmus paper. Ingredients/Tools: * A
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I. GENERAL INFORMATION For my research‚ I have selected to review the Myers-Briggs type indicator personality test. The authors of the test are Katharine Briggs and Isabel Briggs Myers. Katherine and Isabel are a mother and daughter team that worked on the test together. They were influenced by the Swiss psychologist‚ Carl Jung. In 1921‚ he published his ideas regarding different personality. Since Catherine and Isabel had many of the same ideas and agreed with his published work‚ they conducted
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The Effect of pH on the Rate of Osmosis Using a Glucose Solution Melissa Werderitch Biology 157 11/6/06 Introduction In a journal article written by Florian Lang‚ osmosis is essentially explained as the flow of water from one area to another that are separated by a selectively permeable membrane to equalize concentrations of particles in the two locations (Lang‚ 1997). Osmosis is able to maintain osmotic pressure and regulate a cell’s volume. In a hypotonic () or hypertonic () environment
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TITTLE: An essay on development indicators describing the following indicators that may be used to explain levels of development within countries: (a). (b). (c). Gross National Product (GNP) Child (Under- five) Mortality Rate Human Development Index (HDI) TABLE OF CONTENTS 1. Introduction 2. Defining Development Indicators 3. Gross National Product 3.1 Advantages of GNP 3.2 Disadvantages of GNP 4. Child (under - Five) Mortality 4.1 Advantages of child (under-five) Mortality 4.2 Disadvantages
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Individual Investigation - Chemistry Relationship Between H3O+ Concentration and Red Cabbage Indicator Usage Introduction Figure 1: Red Cabbage and Natural Universal Indicator Colour Changes I have always been interested in environmental conservation and colourful ‚ and was one day transferred back to a particular day in the kitchen‚ as a young child‚ while observing my mother cook red cabbage (Brassica oleracea var. capitata f. rubra) coleslaw‚ which is naturally a rich purple in colour
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Na2CO3 and NaHCO3 present in the sample was determined at the end of the experiment. Introduction Soda Ash (Na2CO3) or sodium carbonate is commonly used as a cleaning agent and known as “washing soda”. It was found to be alkali and has a high pH in concentrated solutions. It is soluble in water but its solubility decreases slightly as the temperature increases above 35.4○C or 95.7○F. It is used in many different fields such as manufacturing‚ at home or in industries. It can be produced either
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Acids Bases and pH Scale I. Acids *Acids are ionic compounds ( a compound with a positive or negative charge) that break apart in water to form a hydrogen ion (H+). *The strength of an acid is based on the concentration of H+ ions in the solution. The more H+ the stronger the acid. Example: HCl (Hydrochloric acid) in water Characteristics of Acids: **Acids taste sour **Acids react strongly with metals (Zn + HCl) **Strong Acids are dangerous and can burn your skin
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are pleased to have you here. We have some problems growing Rhododendron.” Christopher replied: “Thank you for your warm welcome. While working with tomato‚ I realized that they grow best at around pH 7. Perhaps‚ it might work well with Rhododendron too!” “Oh‚ you might be right‚ I’ve read that pH affects the intake of the nutrients of plants‚” Dr Ong exclaimed. “I think I have to agree with you‚” replied Christopher. “I forgot to mention that the plot of land is on one of the roof top garden
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