Chemical reactions can happen slowly or fast. The speed of the reaction rate can be changed. Some of the factors that can affect the reaction rate are surface area‚ temperature‚ and concentration and pressure. Surface area is the exposed‚ outer layer of a solid. Increased surface area increases reaction rate because more particles on the surface of a solid come in contact with the particles of another substance. For example‚ if you place a donut stick into water‚ the donut will react slowly with
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3.0 The Social and Cultural factors that influence a sanitation project Sanitation can best be defined as the way of collecting and disposing of excreta and community liquid waste in a germ-free way so as not to risk the health of persons or the community as a whole (WEDC‚ 1998). Sanitation systems properly designed‚ may not necessarily be appropriate for a group of people when relevant factors like social and cultural practices affecting sanitation and hygiene are not taken into account. Lack of
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Factors Affecting the academic performance of working students Chapter 1 THE PROBLEM AND ITS BACKGROUND Introduction The financial burden of education fees are rising. Due to the continues increasing price of tuition fees‚ school fees and other education finances‚ families tend to face financial crisis particularly on managing the budget of the family income. These includes the budget for food‚ education‚ electricity bills and other financial bills. The family is
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CHAPTER ONE 1.0 INTRODUCTION 1.1Background information A joint study by United States Agency for International Development (USAID) and United Nations International Children Education Fund (UNICEF) and Joint United Nations Program on HIV/AIDS (UNAIDS) found out that at the end of 2001‚ 13.4million children under the age of 15 had lost one or both parents to Acquired Immune Deficiency Syndrome (AIDS). The increase in AIDS‚ which orphans many children‚ is one of the major challenges in many countries
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The purpose of the experiment was to perform an electrophilic addition reaction by the bromination of cinnamic acid. The product of this reaction is 3-Phenyl-2‚3-dibromo propionic acid‚ which is purified by recrystallization. Cinnamic acid (3-phenylprop-2-enoic acid) is an unsaturated carboxylic acid. The electron rich π cloud (see Figure 1) in the double bond of this structure is nucleophilic and can be considered a Lewis base. It can therefore be saturated by the addition of a halogen to the double
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Measuring Reaction Rate using Volume of Gas Produced By John Doe 23th October 2012 Introduction An essential element of chemistry is finding reaction rates. This is because chemists need to know how long a reaction should take. In addition to needing to know the rate of a reaction at any point in time to monitor how the reaction is proceeding. Many factors effect reaction rates‚ two shown above include temperature and concentration. Concentration affects the rate of reactions because the
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BIOLOGY INVESTIGATION Research question: Factors affecting on the steady level of the temperature in human body‚ or How/Which factor affects on Homeostasis. Research statement: Factors affecting on the internal temperature of the human body. Purpose of investigation:To find out which all factors affects on the steady level of temperature in human body. My factor is that external/environmental temperatgure affects on the internal temperature of the body. Hypothesis: Environmental
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Mashrek International School Investigate the Factors that Affect the Rate of Respiration in Yeast. (Temperature) Fawzi El Ansari Biology HL Title: Investigate the Factors that Affect the Rate of Respiration in Yeast. (Temperature) Aim: The aim of this experiment is to investigate the effect of changing the temperature on the rate of respiration in yeast. This will be done by placing equal amounts of yeast in each beaker that contains the same pH solution. Each beaker will be mixed with glucose
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Ammonia and Hydrochloric Acid Lab Chemistry 1 Abstract The straw should be cut shorter to 8 cm in order to make the solid ring appear in the center of the straw. We achieved our goal‚ cutting the straw caused the gases to not have to go as far‚ and meet in the middle. Background The particles in a gas are very loose and tend to move around a lot very quickly. The particles in a solid are very compact and vibrate but don’t really move very much. The particles in a liquid however are more
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Factors Affecting Fermentation of Glucose by Yeast Introduction: Fermentation is anaerobic respiration whereby food is altered into more simple compounds and energy in the form of chemicals is produced‚ an example being adenosine triphosphate (biology-online.org/dictionary/Fermentation). All this occurs with the lack of atmospheric oxygen. At the end of the day alcohol and carbon dioxide are the end products when yeast is used in the fermentation procedure. But end products like acetic acid
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