Practical: The Effect of Concentration on Reaction Rate Aim: To use a simple reaction between sodium thiosulphate and hydrochloric acid to discover concentration this determines how fast chemical reactions occur. Independent Variable: Concentration of hydrochloric acid (%) Dependent Variable: Time taken for chemical reaction to take place (sec) Hypothesis: My prediction is that the increased concentration of the thiosulfate will in turn lead to an increase in the rate of reaction. This
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Caffeine can effect you. Caffeine is an influence in our society these days and every few months we hear about how a study has shown that it is bad for us or good for us. What are we to believe? I’d like to give you some of the facts about caffeine and its effects on your body. It may not cause you to change your coffee consumption but at least you’ll be better informed about what you are putting into your body. I’m going to talk about the beneficial effects of caffeine‚ the negative effects and discuss
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Qais Ahmad Noor Chris Henderson English 110 section 10 ID# 8651 Cause and Effect Essay Causes of Road Accidents in Afghanistan Every day in every part of the world there is a road accident and most of these accidents are very fatal. In Afghanistan the road accidents are much greater compared to most of other countries. Every hour‚ there are several road accidents and almost majority of the accidents are very serious. Many people die due to fatal accidents in Afghanistan because of lack of experienced
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antiretroviral treatment reduces the risk of death and complications from the disease‚ these medications are expensive and may be associated with side effects. Genetic research indicates that HIV originated in West-central Africa during the early twentieth century. AIDS was first recognized by the Centers for Disease Control and Prevention (CDC) in 1981 and its cause—HIV infection—was identified in the early part of the decade. Since its discovery‚ AIDS has caused nearly 30 million deaths (as of 2009). As
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Introduction Low birth rate is an issue that most of developed countries are facing. Many women became career minded and did not want to sacrifice climbing up the career ladder to start a family. The education of women and their ability to earn high income have altered social behavior and led to marriages later in life. The cause of this problem in the first place is their minds are occupied with fear of the costs and burden of having children. (Loh‚ 2012). In the western European countries
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Brooke Strowd AP Biology Ms. Butler 28 January 2013 I. Title: Effect of a Catalyst on Reaction Rate II. Introduction: The basis of the experiment is the enzyme; an enzyme is a biological molecule that acts as a highly selective catalyst. By combining with a substrate‚ an enzyme is able to create a new product that helps the body function. (Ex. Lactose/Lactase) A substrate is a molecule an enzyme acts upon‚ the two combine at an area called an active site. This active site allows induced fit
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Effects of SO2 On Fermentation Rates Purpose SO2 is the primary inhibitor for natural microbiological growth in wine. It prevents the browning of juice by inhibiting phenol oxidase activity and kills the natural yeast cells for the utilization of fermentation-controlled commercial Saccharomyce strands (Boulton et al. 1996). SO2 is pH and temperature dependent and can exist as several forms. The bisulfate form (HSO3-) can complex with soluble solids such as anthocyanins and acetaldehydes to become
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CAUSES AND EFFECTS OF PROSTITUTION INTRODUCTION Legally‚ Prostitution is the sale of sexual services. The services may consist of any sexual acts‚ including those which do not involve copulation. While payment may be any nonsexual consideration‚ most commonly it is the form of "money". Prostitution is said to be one of the “oldest profession in the world”. Most people do the jobs they do only for the money‚ not because they actually enjoy "the work" enough to continue doing it even without a
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neighborhoods‚ is the theory that best explains the causes of crime. Ecological criminology was the first social criminology. This developed during the 1920s at the Department of Sociology at the University of Chicago. Ecology is the study of relationships between an organism and the environment it lives in‚ and this type of theory explains crime by the disorganized eco areas where people live instead of the kind of people who live there. The major factors of crime are poverty‚ crowded homes‚ and unsupervised
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Cause and effect of global cancer Cancer is a leading cause of death globally. Three-quarter of cancer deaths occur in developingcountries or the third world (WHO‚ 2010). If current knowledge were put into practice‚ at least one third of cancer cases could be prevented‚ another third could be detected early‚ treated and cured; and suffering could be alleviated through palliative care for patients with advanced cancers. (WHO‚ 2009) In low- and middle-income countries‚ cancer overwhelmingly affects
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