I. Abstract: By manipulating the ideal gas law (PV=nRT)‚ we will be determining the molar mass of an unknown volatile liquid. Heating a flask filled with an unknown‚ easily evaporated liquid will allow for measurements that can be taken to work out the ideal gas equation. This lab will require knowledge of basic equations used in chemistry. Using these equations‚ such as density and number of moles(n)‚ we can substitute different values into the ideal gas law to manipulate it.
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solute is too high. The melting point will be lower than expected. 5. Part B.2. The solute dissociates slightly in the solvent. How will the slight dissociation affect the reported molar mass of the solute- too high‚ too low‚ or unaffected? Explain. -The solute dissociating slightly will cause you to calculate a molar mass that is too small if you neglect the dissociation by assuming i=1 instead of the correct value of i‚ which is >1. 6. Part B.3. The temperature versus time data plot shows no
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Usman Omid Chemistry IB 1A Enthalpy Of Solution _Introduction_ AIM The aim of this investigation was to determine the enthalpy of the solution created when dissolving Sodium Hydroxide (NaOH) in water (H2O). THEORY When a solid ionic compound is dissolved in water a change of enthalpy is involved. _The enthalpy of a solution_‚ ΔHsol is the enthalpy change when one mole of the substance is dissolved in water to form aqueous solution. � CHEMICAL Sodium Hydroxide (NaOH) PROCEDURE The recommended
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Braz Dent J (2002) 13(2): 137-141 Bilateral fusion ISSN 0103-6440 137 Bilateral Fusion of Mandibular Second Molars with Supernumerary Teeth: Case Report Eduardo NUNES 1 Ivaldo Gomes de MORAES 2 Paulo Márcio de Oliveira NOVAES 3 Simone Maria Galvão de SOUSA4 1 Department of Endodontics‚ Pontificial Catholic University‚ Belo Horizonte‚ MG‚ Brazil 2 Department of Endodontics‚ Bauru Dental School‚ Bauru‚ SP‚ Brazil 4 Department 3 Private Endodontic Practice‚ Belo Horizonte‚
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1. Standarization of NaOH with Potassium Hydrogenphthalate (KHC8H404) The hygroscopic nature of NaOH requires its solution to be standardized with a stable primary standard such as potassium hydrogen phthalate. The exact molar concentration of NaOH solution can then be accurately determined. 1.1) Prepare the stock NaOH solution by dissolving about 4 g of NaOH pellet in 100 mL of deionized water. Note that NaOH is a hazardous chemical which is corrosive to skin and irritant to eye‚ be cautious and
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CHEMISTRY EXPERIMENTAL REPORT SALLY LI INTRODUCTION: In chemistry‚ compounds can be distinguished by using the empirical formula. The formula provides the simplest positive integer ratio of elements in a compound. The empirical formula is largely useful in determining the ratio of elements within ionic compounds where the structure is of a non-directional nature of bonding where any ion at any time could be surrounded
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Calculating the Enthalpy Change of Reaction for the Displacement Reaction between Zinc and Aqueous Copper Sulphate Data Collection and Processing Observations: * Drops of water left on the inside of the measuring cylinder * Hole in the lid‚ possible escape route for gas or splash-back * The polystyrene cup felt warm during the reaction By extrapolating the graph we can estimate what the rise in temperature would have been if the reaction had taken place instantaneously. I can
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Name: Abdirizaq Hussein Date:2/12/15 Graded Assignment Lab Report Answer the questions. When you are finished‚ submit this assignment to your teacher by the due date for full credit. (3 points) 1. Write the goal of the lab or the question you tried to answer. Answer: See what makes litmus paper change colors. (3 points) 2. Which observations‚ experiences‚ or lesson materials helped you form your hypothesis? Answer: The lab tutorial lessons‚ and quizzes helped (3 points) 3. State your hypothesis
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through one of the set up apparatus so that the liquid goes through the funnel‚ through the burette and into the flask. Time the neutralization with a stopwatch as soon as the liquid drips its first drop into the flask and stop the stopwatch after it has experienced turning from transparent (acid) to pink (base)‚ then to transparent again‚ as when it reaches neutralization. 10. Repeat step 9 for the second set-up apparatus aside for the second trial and reuse the first apparatus after cleanup for
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T H E HEAT O F NEUTRALIZATION O F STRONG ACIDS AND BASES IN H I G H L Y DILUTE AQUEOUS SOLUTIONS] Can. J. Chem. Downloaded from www.nrcresearchpress.com by 86.145.230.179 on 01/15/13 For personal use only. ABSTRACT Heats of neutralization of sulphuric and hydrochloric acids by sodium hydroxide have been determined‚ using a microcalorimeter of the Tian-Calvet type. The range of concentrations employed was 5x10-" N to 3x10-* N‚which is sufficiently low to permit an accurate extrapolation to be
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