temperature. The colour changes accompanying the changes in equilibrium position are as predicted by Le Chatelier’s principle. * Be able to write the equilibrium constant expression for a weak acid‚ a weak base‚ and a sparingly-soluble salt. Titrations * What is the difference between endpoint and equivalence point? Are they different? (Yes!) How so? (Equivalence point is reached when moles of analyte (what’s in the flask) equal the amount of titrant (what’s in the buret). Another way we stated
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Determining the Percentage of 2-ethanoylhydroxybenzoic Acid in an Aspirin Tablet Introduction and Aim: An Aspirin tablet is an analgesic; therefore the purpose is to relieve pain and due to it also being an antipyretic its other tenacity is to lower the body temperature. An experiment was carried out on the basis of calculating the percentage of 2-ethanoylhydroxybenzoic Acid in aspirin tablets hence 4 commercial tablets were taken to determine its purity using a known volume of standard sodium
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Standardization of Solution and Titration Lab Report‚ Preparing a Dilute HCl Solution from a Concentrated One Titrating NAOH Solution with HCl Solution (of Known Concentration) Chemistry lab report(by abdazino abdalla) International College Objective preparing a dilute HCl solution from a concentrated one titrating NAOH solution with HCl solution (of known concentration) Procedure Section A: Preparation of 100.0cm3 0.480 mol/dm3 HCl solution a)Determine the volume of the concentrated acid
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we have to use to neutralize Before titrate pour 2 two drops of phenolphthalein on to calcium carbonate Titrate until it look light pink Titrate at least three times Now use your record to calculate (see the calculation below) When use back titration Result of how much NaOH is used: 1st time 5.3 cm cube 2nd time 5.5 cm cube 3rd time 5.4 cm cube
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Question # 1: You are titrating 50 ml. of nitrous acid with sodium hydroxide (0.15 M). Equivalence is reached at 22.0 ml of NaOH delivered. Calculate the pH of the solution in the flask: a- before the beginning of the titration - after the delivery of 5 ml. of titrant b- at half-equivalence c-at equivalence d-after delivery of 23 ml. of titrant Part A) Reaction is: HNO2 + OH- NO2- + H2O Ka for Nitrous acid = 7.2E-4 Kw = Ka*Lb Kb = 1.0E-14/7.2E-4 Kb = 1.38E-11 Moles of base:
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INTRODUCTION OF NIGERIAN AGIP OIL COMPANY Eni E & P Division commenced activities in Nigeria in 1962 through a wholly owed subsidiary NAOC Limited. Activities of Eni in Nigeria have grown over the years resulting in the establishment of other companies. These include the Agip energy and Natural Resources [Nigeria] Limited operating in the shallow water offshore and the Nigerian Agip Exploration Limited‚ which concentrates on the deep water frontier region. NAOC Limited operates in the land
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Thornton James Keel 7/20/13 Title: Titration for Acetic Acid in Vinegar Purpose: The objectives in this lab were to develop familiarity with the concepts and techniques of titration and to determine the concentration of an acetic acid solution in vinegar. Procedure: Data Tables: Data Table 1: Quantity of NaOH needed to Neutralize 5 mL of Acetic Acid Brand of Vinegar Used: heinz Label Notes: none | | Initial NaOH reading(Interpolate to 0.1 mL) | Final NaOH reading(Interpolate
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1) For raw guavaN1V1 = N2V2 N1 x 10 = (1/10) x132 1/10 x Normality of oxalate = ( x /100) = strength of oxalate in freshguava extract = normality x Eq. mass of oxalate ion= 1.32/100 x 44g/litre of diluted extract= 0.581 g L -1 2) For semi ripened guava (1 day old).Strength of oxalate in one day old guava extract= (1.37 /100) x 44g/litre of diluted extract= 0.603 g L -1 ) For ripened guavaStrength of oxalate in fresh guava extract= ( 1.39/100) x 44g/litre of diluted extract=0
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Results Table 1: Experimental results for part A Trial 1(L) Trial 2(L) Trial 3(L) Trial 4(L) Trial 5(L) Initial Reading 0 0 0 0.4 0.9 Final Reading 19.7 19.1 18.9 19.7 19.9 Titre Value 19.7 19.1 18.9 19.3 19 Table 1 above displays the titres obtained during 5 trials in part A of this assay. The titre values procured in trial 2‚ trial 3 and trial 5 manifests an agreement within 0.1mL. However‚ the result achieved in trial 1 and 4 are outliers because of their distance from other observations
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GUIRU NANAK PUBLIC SCHOOL SECTOR-21‚ NAYA BAZAR ROURKELA Dist. SUNDERGARH CHEMISTRY INVESTIGATORY PROJECT SESSION 2013-14 BY : SHRISHTI VISWAKARMA CLASS : XII-A ROLL No : 28 GUIDED BY : Mr.NEERAJ PANDEY & Mrs.YOGITA CHANDAK Certificate This is to certify that miss SHRISHTI VISWAKARMA student of Guru Nanak Public School‚ Sector-21‚ Rourkela class XII-B ROLL No 26. In the Session 2013-14 has completed the chemistry
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