Analysis of Soda Ash and Volumetric Analysis of a Carbonate-Bicarbonate Mixture Manalo‚ Ma. Cristina Joyce B. Department of Chemical Engineering‚ Faculty of Engineering University of Santo Tomas Espana‚ Manila A. Abstract Crude sodium bicarbonate or commonly known as soda ash may contain amounts of impurities like chlorides and hydroxides. The total acid neutralizing capacity of a soda ash sample‚ its alkalinity value‚ was stated in terms of mass of sodium carbonate. In doing so‚ any
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ASSESSING CRITICAL THINKING SKILLS THROUGH A LABORATORY ACTIVITY ON MIXTURES An Undergraduate Thesis Presented to the Faculty of the Department of _____________________ College of ______________ _______________________ _________ City In Partial Fulfillment of the Requirements for the Degree Bachelor of ______________ Major in _________________ ___________________________ ___________________________ CHAPTER I THE PROBLEM AND ITS SCOPE Introduction Thinking has
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Critical Reading on Gender’s Nature: Intersexuality‚ Transsexualism and the Sex/Gender Binary In this article‚ Hird’s uses feminist theory to support her studies‚ involving postmodernist concepts to the morphological notion of ‘sex’. She advanced on by unifying her study with evidence from two bodily forms: intersexuality and transsexualism that are currently challenging the modern ‘sex/gender’ binary. The purpose for Hird to take intersexuality and transsexualism into her argument is
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Experiment #1: Determination of the Solid-Liquid Phase Diagram for Napthalene-Biphenyl Using Thermal Analysis Objective To apply thermal analysis to the two-component system‚ naphthalene-biphenyl at atmospheric temperature. The analysis will be represented by a solid-liquid phase diagram (freezing point diagram). Theoretical Principles Phase Equilibria and the Gibbs Phase Rule This experiment is conducted in order to study a condensed system (solid-liquid) at constant temperature (atmospheric
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Determining the accuracy of varieties of pipettes by weighing and finding the density of a liquid Abstract Different varieties of pipettes (P100‚ PR1000 pipettors and a serological pipette) along with a weighing balance was used in this investigation to check the density of an unknown liquid by first finding out what the liquid weighed and plotting a graph of the mass in grams against the volume of the liquid used in micro litres (µl) and finding the gradient of the graph (∆Y/∆X). Most of the standard
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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 Antiseptic Liquid is 4.8% chloroxylenol
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The 21st Century Energy Solution: Liquid Flouride Thorium Reactor Recently the spotlight has been set on renewable energies to assist with weaning off of greenhouse gas emissions‚ solving issues with energy independence‚ and to exploit their inherent renewability. Unfortunately our technology is not quite up to speed economically with our wish to rely completely on renewable energy‚ thus many non-renewable energies are recognized as viable options to power our economy (Fraser‚ 2011). The United
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Thermometer Works - pg. 23 Purpose: What makes the liquid within a thermometer go up and down? Hypothesis: If the liquid is placed into objects of different temperatures‚ then the liquid moves up in the hotter substance and down in the colder substance‚ because of the change in the molecular energy when the water is hot and when the water is cold. Materials: Test tube‚ about 20 mL Isopropyl rubbing alcohol‚ 91% Small cup 2 small disposable water bottles (8 oz.) or 2 small beakers Food
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materials‚ dissolving lies somewhere between these two examples. Hesse (1992) states that the most universal example of dissolving involves a solid and a liquid‚ usually water. When a solid called a solute is mixed with a liquid called a solvent‚ the solute particles breakdown and spread them selves out to be closer to the solvent particles. This mixture is then called a solution. If the solute is coloured it will be easy to see a visible change‚ however if the solute was colourless‚ then the solution
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useful for the simple identification of colourless organic liquids and ones that are often found at the scenes of crime. The first test carried out was the Lucas test which was used to identify a variety of alcohols following the contribution of a given solution‚ from carrying this out I could then identify that primary and secondary alcohols were present with one tertiary alcohol also being present however despite this given the colourless liquid that formed it is questionable as to whether the first
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