THE EFFECT OF INCREASING THE CONCENTRATION OF DETTOL ANTISEPTIC LIQUID ON THE GROWTH OF E.COLI Background: Escherichia coli are rod shaped‚ gram negative bacteria often found in the gut of humans and other warm-blooded mammals (Jacques & Ngo‚ 2004). It is transmitted primarily through faecal contaminated food and water. Most strains of E. coli are not harmful to humans‚ however some strains are pathogenic and can cause symptoms including diarrhoea (Unknown‚ 2012). The active ingredient in Dettol
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EXPERIMENT TO SHOW THE EFFECT OF DIFFERENT CONCENTRATION OF GLUCOSE ON POTATO STRIPS INTRODUCTION: Molecules of liquid and gas are constantly in motion‚ they move randomly in all directions and bounce around in all directions and bounce around and into each other. As they move‚ they tend to spread out moving from areas with many molecules to areas with fewer molecules . This process of spreading out is called Diffusion‚ for example smell of cooking travelling around the house from the kitchen
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Nazis set up concentration camps to further imprison his control over the Jews. Concentration camps had two types of camps‚ death camps and work camps where they were either enslaved and worked under devastating conditions‚ or they were immediately killed. These concentration camps were set up all over Germany but primarily Poland. Enemies of the state or the people that protested the Nazi were kept under control so that Adolf Hitler could still dominate
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Practical Task: To compare the concentration of vitamin C in different brands of orange juice. Juice sample provided: 0.1% vitamin C solution‚ fresh orange juice‚ You C 1000 orange water. Aim of investigation: To compare and verify the amount of vitamin C in Mr. Juicy and You C 1000 orange juice. Introduction: Problem: To compare the concentration of vitamin C Hypothesis: Concentration of vitamin C in Mr. Juicy is about 0.02 % Concentration of vitamin C in You C 1000 orange water
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rate of reaction these include the concentration of the reactant‚ the temperature‚ the surface area of solid reactant‚ and the pressure. To prove this theory‚ I will holding a rate of reaction experiment. I will investigate how the difference of hydrochloric acid affect the rate of reaction in 30 seconds reaction between hydrochloric acid and magnesium with balanced equation of Mg + 2HCl → MgCl2 + H2. According to the chemguide website‚ by increasing the concentration of the reactant the particles will
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sure to read and understand the below instructions BEFORE the lab! Experiment 1: Investigating the Effect of Temperature and Salinity on the Concentration of Dissolved Oxygen in Water Introduction: In an aquatic environment‚ oxygen must be in a solution in a free state (O2) before it is available for use by organisms (bio-available). Its concentration and distribution in the aquatic environment are directly dependent on chemical and physical factors and are greatly affected by biological processes
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aimed for weaker countries like Poland. He began something called concentration camps (What are Concentration Camps?). People‚ who were Jewish‚ homosexual‚ and mentally ill‚ were forced to live in these camps. With Poland being weak and having the largest number of Jews‚ the camps begin here (Concentration Camps‚ 1933–1939). If anyone was considered a "threat" to the German community‚ they were put in the something called a concentration camp. People who are Jewish‚ homosexual‚ mentally ill‚ and sometimes
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are carrying out an investigation to find out how different concentrations of glucose affect osmosis in potato cells. Osmosis is the passive process of diffusing water which means within this experiment particles of water will move from a lower concentrated area to an area of higher concentration ; in this case it will be a concentration of glucose. Diffusion is when particles move from an area of high concentration to low concentration ; for example when a smell of cooking spreads through the house
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Investigation into How the Concentration of a Reactant Can Affect the Rate of Reaction Aim To plan an investigation that allows me to measure the effect of increasing the concentration of a reactant on the rate of reaction. With the results generated‚ it is also hoped to draw accurate conclusions and explain the results using scientific knowledge. Introduction Some reactions are fast‚ for example neutralisation or burning magnesium in air to produce magnesium oxide. However‚ other reactions
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potatoes and different sucrose concentrations (0.15‚ 0.20‚ 0.25‚ 0.30‚ 0.35 and 0.50). It was expected that the potatoes would lose weight as the potatoes would have lower water potential when placed in a solution ‚ and in this can be taken from the theory of osmosis which states that “the passive diffusion of water molecules across a selectively permeable membrane down a concentration gradient” (Taylor and Bruenn‚ 2009)‚ moving water from a high to a low concentration‚ so in this case water would
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