monosaccharide reducing sugar (Kolej Mara Banting – Students’ Handbook for Biology HL Year 1). It is the simplest form of carbohydrate. In this experiment‚ sulphuric acid‚ H2SO4 and potassium permanganate‚ KMnO4 is added into glucose with different concentration and the time taken for the purple pink colour of potassium permanganate solution to change to colourless is recorded. This is because glucose donates electrons to the permanganate ions‚ causing it to change colour (Kolej Mara Banting – Students’ Handbook
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second objective of the experiment was to produce a value for water density. It was expected that when additional mass was added to a floating vessel‚ it would displace more fluid and the increasing submerged volume of water could be measured‚ and a value for water density could be calculated using the equation . The density of pure water was assumed to measure 1000 kg/m³ at 4°C however it was also assumed that the tap water used in the experiment would produce slightly different results. The experiment
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Could Have In the poem “Could Have” by Wislawa Szymborska‚ she constructs the poem in such a way that she is speaking not to one singular person‚ but everyone affected by the Holocaust. Szymborska writes‚ “You were saved because you were the first. You were saved because you were the last.” I believe this is her way of broadening the horizon of who she is talking to. From what we know about Szymborska and her past careers as a poetry editor‚ a columnist‚ and a translator we can see that right off
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aim of this experiment was to calculate the concentration of an unknown solution of Sodium Hydroxide (NaOH) by titrating it with Hydrochloric Acid (HCl) and to identify any possible sources of error. A colour change from pink to yellow signified the end of each individual titre as the NaOH had been neutralised. Experimental: Method: Firstly two solutions were prepared to show the colour of the Phenol Red indicator in acid and alkaline conditions. These colours were then used to determine the end
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How Much Gas is Produced? Julie Dang June 23‚ 2013 Purpose The Company ABC Chemical has asked our group to investigate the gas production from a number of various chemical reactions. The company would like us to measure the amount of product we get when we measure the amount of gas from two reactions. We will then compare our data to the predicted amount which will we will calculate based of the Law of conservation of Mass and Ideal Gas Laws. Methods Materials Thermometer CaCO3
Free Gas Pressure Ideal gas law
Experiment Title : Determination of relative densities and water absorption of coarse aggregates. Objective : To determine the relative densities and water absorption of a coarse aggregate. Description of Sample : The sample used was naturally occuring riverside aggregate and was left to soak for 24 hours prior to the experiment. Apparatus Required A pycnometer – a pycnometer is a litre glass jar which has a conical screw on it ’s lid‚ and a small aperature at the apex of the conical lid. The
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Results Line of Best Fit Graph Error Bars Graph Gradients Graph Analysis • Error Bars Analysis Evaluation • Improvement Assessment • Improved Experiment. • Reliability References Introduction: For this data analysis project‚ I conducted and experiment to investigate how the concentration of an acid affects the rate of the reaction. I have set up the experiment’s equipment as shown on figure 1. As you can see by figure 1‚ I have used the reaction between sodium thisoulphate
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COULD THE HOLOCAUST HAVE BEEN PREVENTED? You have probably heard about a period of time‚ not so long ago‚ known as ’The Holocaust.’ A holocaust‚ according to Webster’s dictionary‚ is ’a complete destruction by fire’ (Stadtler‚ 1). In Europe‚ during this period‚ there was a complete destruction by fire - of Jewish homes‚ Jewish businesses‚ Jewish neighborhoods‚ and Jewish people. This destruction was carried out under the direction of Adolf Hitler‚ during the years 1939-1945‚ but it actually began
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Should anonymized data be used freely? This answer‚ for me‚ is two-fold. When it comes to the topic of public health surveillance‚ anonymized data should be used without informed consent. The data tracking methods for public health surveillance help determine pockets of disease and deploy treatment strategies prior to an epidemic. The rationale for this standpoint is that the greater good of the population. In the example of the recent Ebola epidemic‚ the epicenter of the disease was identified
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GS104 Lab Report Experiment # 1 Measurement‚ Length‚ Mass‚ Volume‚ Density & Time David Case: January 17‚ 2015 Experiment #1 Measurement‚ Length‚ Mass‚ Volume‚ Density‚ & Time Objectives: To make basic distance‚ mass‚ density‚ and time measurements. To make calculations of volume and density‚ using proper units‚ and to practice using graphing software while graphing the relationship between the circumference of a circle and its diameter. Materials:
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