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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Emergence of Liquid Fund as a Prominent Option for Treasury Management Executive Summary All organisations maintain current accounts in banks to ensure prompt deposit and withdrawal of money‚ while the money in the current account does not fetch any return. With increase in competition and squeezing of profit margins‚ measures were required to utilize the money lying idle in the current account without hampering the prompt flow of money. Liquid funds provide the solution for utilization of
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INTRODUCTION: A high Reynolds number Newtonian liquid jet‚ exiting a two-dimensional channel‚ is examined in this study. Fully developed Poiseuille flow‚ driven by an applied pressure gradient‚ is assumed to prevail upstream of the channel exit. Flow is assumed to be laminar‚ steady and incompressible. A free surface develops as the fluid exits the channel. The resistance of the air on the free surface of the liquid jet can be neglected so that‚ the shear stress at the channel wall disappears and
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Part I: Density of Unknown Liquid Trial 1 Trial 2 Trial 3 Mass of Empty 10 mL graduated cylinder (grams) 25.55 25.56 25.55 Volume of liquid (milliliters) 8.8 8.65 8.5 Mass of graduated cylinder and liquid (grams) 30.65 30.62 30.565 Part II: Density of Irregular-Shaped Solid Mass of solid (grams) 39.537 38.515 40.975 Volume of water (milliliters) 50.01 49.9 52.4 Volume of water and solid (milliliters) 54.9 54 57 Part III: Density of Regular-Shaped
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SORPTION BEHAVIOR OF HIBISCUS CANNABINUS L. CORE IN SIMULATED BUNKER OIL C – SEAWATER MIXTURE Lea C. Tan‚ Trina G. Napasindayao‚ Florinda T. Bacani Chemical Engineering Department‚ De La Salle University-Manila‚ Philippines 2401 Taft Avenue‚ Malate‚ Manila‚ Philppines‚ 1004 Keywords: Kenaf; mathematical equation; quantifying sorbent capacity; oil spill; sorbent; sorption ABSTRACT Sorption using natural sorbents is an alternative method of oil spill treatment. This research
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