Quantitative Determination of Sulphate by Gravimetric...

CP4001: ANALYTICAL amp; PHYSICAL CHEMISTRY | | Formal Report of the Quantitative Determination of Sulphate by Gravimetric Analysis (Experiment 4) | Maryjo Lee Wei Min 1111107 DBS/FT/1A/01 | (A) Synopsis The amount of sulphate is determined quantitatively as barium sulphate by gravimetric analysis. This determination consists of slowly adding a dilute solution of barium chloride to a hot, unknown sulphate solution which is slightly acidified with concentrated hydrochloric acid. A white precipitate will formed and is then filtered off, washed with deionised water, dried in the oven and weighed as barium sulphate. The percentage of sulphate is calculated from the weight of barium sulphate. (B) Objective The purpose of the†¦show more content†¦F) Test for complete precipitation by adding a few drops of barium chloride to clear the supernatant liquid. 2) Washing and Filtration of Barium Sulphate Precipitation A) Pre-weigh a crucible. Ensure that the crucible has a filter paper that covers the base of the crucible completely. B) Decant the clear supernatant liquid by filtration at the vacuum pump into the crucible. C) Use a ‘rubber-policeman’ to dislodge any particles on the beaker, and then rinse the beaker with warm deionised water. Empty the contents into the crucible while the vacuum pump is at work. D) Further wash the precipitate with warm, deionised water at the vacuum pump twice more. E) Discard the filtrate. 3) Drying and Weighing of Barium Sulphate Precipitate A) Dry the crucible with the barium sulphate precipitate in the oven at 150 °C for about 30 minutes. B) Cool the crucible in a desiccator for about 10 minutes. C) Weigh the crucible when it has cooled down. D) The difference between this weight and the empty crucible (including the filter paper) is the weight of the barium sulphate precipitate. (E) Results and Calculations Weight of crucible with the precipitate: 14.0996 g Weight of crucible (with piece of filter paper): 13.9030 g ∠´ Weight of barium sulphate precipitate: 0.1966 g Ba2+ + SO42- ------------- BaSO4 (Moles of SO42-)/(Moles of BaSO4 ) =Show MoreRelatedQuantitative Determination of Sulphate By Gravimetric Analysis1637 Words   |  7 PagesCP4001) EXPERIMENT 4: QUANTITATIVE DETERMINATION OF SULPHATE BY GRAVIMETRIC ANALYSIS FORMAL REPORT NAME: CHIA KOK SIONG ADMIN NO: 1027325 CLASS: DFST/FT/2B/21 ï ¿ ½ SYNOPSIS The objective of this experiment is to determine the amount of sulphate by gravimetric analysis. The amount of sulphate is determined quantitatively as barium sulphate, BaSO4, by gravimetric analysis. For the experiment, a dilute solution of barium chloride was slowly added to a hot unknown sulphate solution slightly acidifiedRead MoreQuantitative Determination of Sulfate by Gravimetric Analysis2004 Words   |  9 PagesQuantitative Determination of Sulphate by Gravimetric Analysis Table of Contents: 1. Synopsis 2. Objective 3. Theory 3.1: Summary 3.2: Technique 3.3: Chemicals 3.4: Instruments 4. Procedures 4.1: Precipitation of BaSOâ‚„ 4.2: Washing and Filtration of BaSOâ‚„ Precipitate 4.3: Drying and Weighing of BaSOâ‚„ Precipitate 5. Results and Calculations 6. Discussions 7. Conclusion 8. References 1. Synopsis: This report is written about determiningRead MoreAnalytical Chemistri Intro1796 Words   |  8 PagesAnalytical Chemistry I 1 Course Outlines ï‚â€" ï‚â€" ï‚â€" ï‚â€" ï‚â€" ï‚â€" ï‚â€" ï‚â€" LU1 :Analytical Chemistry Overview LU2: Measurements and Data Treatment LU3: Stoichiometric Calculations LU4: General Concepts of Chemical Equilibrium LU5: Gravimetric Methods LU6: Acid-Base Equilibria LU7: Acid-base titrations LU8: Analytical Separations Course Assessment Laboratory reports (15%) ï‚â€" Assignments (15%) ï‚â€" MidTerm Examination (30%) ï‚â€" Final Examination (40%) ï‚â€" 3 References 1. Christian, G.D. (2003)Read MoreBiodegradation of Hydrocarbons from Crude Oil by Pseudomonas Putida4958 Words   |  20 PagesStrain 5.3 Preparation of SubCultures of Bacterial Strain 5.4 Centrifugation of Crude Oil 5.5 Subculturing Of Petri Plates with oil 5.6 Biodegradation Studies 5.7 Gravimetric Analysis 6. Results 6.1 Growth Analysis of Pseudomonas Putida 6.2 Gravimetric Analysis 7. Discussion 8. References 1. ABSTRACT Oil spills have become a serious problem with the ever-increasing resource exploitation, transportation, storage, and accidental leakageRead MoreContamination of the Turag River19368 Words   |  78 Pagesdifferent water quality parameters due to season change, i.e. dry and wet season 4. To assess the heavy metal contamination of the sediment of the Turag River 5. To analyze the Sediment quality of the river bed 6. Comparison of the data analysis according to different national and international standards If the sources of major waste disposal outlets into the Turag River can be taken care of, it is firmly expected that the river can get relieve from pollution to a great extent. So, it Quantitative Determination of Sulphate By Gravimetric... ANALYTICAL PHYSICAL CHEMISTRY ( CP4001) EXPERIMENT 4: QUANTITATIVE DETERMINATION OF SULPHATE BY GRAVIMETRIC ANALYSIS FORMAL REPORT NAME: CHIA KOK SIONG ADMIN NO: 1027325 CLASS: DFST/FT/2B/21 ï ¿ ½ SYNOPSIS The objective of this experiment is to determine the amount of sulphate by gravimetric analysis. The amount of sulphate is determined quantitatively as barium sulphate, BaSO4, by gravimetric analysis. For the experiment, a dilute solution of barium chloride was slowly added to a hot unknown sulphate solution slightly acidified with concentrated HCl. The precipitate is then filtered off by suction filtration, washed with water and dried in the oven at 150 degree Celsius for about half an hour and cooled in the desiccator, and†¦show more content†¦Cooling the precipitate in the desiccator is to prevent the capture of moisture in the outside air as the desiccator controls the level of humidity in it while the precipitate cools down. For the weighing of the crucible, it is done in a closed balance, so that it can measure a very accurate weight of the collected sulphate. ï ¿ ½ PROCEDURES PRECIPITATION OF BARIUM SULPHATE 25mL of the given sulphate solution was pipette into a 250mL beaker. 50mL of water and 5 drops of concentrated HCl was added. The solution was heated till boiling and vigorously stirred. 10mL of 10% barium chloride solution was added drop wise from a measuring cylinder. The beaker was covered with a watch glass and digested for 20 minutes. A few drops of barium chloride was add to the clear supernatant liquid to test for complete precipitation. WASHING AND FILTRATION OF BARIUM SULPHATE PRECIPITATE The filter paper was positioned to cover the entire base of the crucible completely. The clear supernatant solution was decanted by filtration into the pre-weighed crucible with filter paper. A rubber-policeman was used to dislodge any particles on the beaker and the beaker was rinsed with warm deionised water. The contents were emptied into the crucible while the vacuum pump was still at work. The precipitate was further washed with warm deionised water at the vacuum pump two more times. The filtrate was discarded. WASHING AND FILTRATION OF BARIUM SULPHATE PRECIPITATE The crucibleShow MoreRelatedQuantitative Determination of Sulphate by Gravimetric Analysis1582 Words   |  7 PagesCP4001: ANALYTICAL amp; PHYSICAL CHEMISTRY | | Formal Report of the Quantitative Determination of Sulphate by Gravimetric Analysis (Experiment 4) | Maryjo Lee Wei Min 1111107 DBS/FT/1A/01 | (A) Synopsis The amount of sulphate is determined quantitatively as barium sulphate by gravimetric analysis. This determination consists of slowly adding a dilute solution of barium chloride to a hot, unknown sulphate solution which is slightly acidified with concentrated hydrochloric acid. A whiteRead MoreQuantitative Determination of Sulfate by Gravimetric Analysis2004 Words   |  9 PagesQuantitative Determination of Sulphate by Gravimetric Analysis Table of Contents: 1. Synopsis 2. Objective 3. Theory 3.1: Summary 3.2: Technique 3.3: Chemicals 3.4: Instruments 4. Procedures 4.1: Precipitation of BaSOâ‚„ 4.2: Washing and Filtration of BaSOâ‚„ Precipitate 4.3: Drying and Weighing of BaSOâ‚„ Precipitate 5. Results and Calculations 6. Discussions 7. Conclusion 8. References 1. Synopsis: This report is written about determiningRead MoreAnalytical Chemistri Intro1796 Words   |  8 PagesAnalytical Chemistry I 1 Course Outlines ï‚â€" ï‚â€" ï‚â€" ï‚â€" ï‚â€" ï‚â€" ï‚â€" ï‚â€" LU1 :Analytical Chemistry Overview LU2: Measurements and Data Treatment LU3: Stoichiometric Calculations LU4: General Concepts of Chemical Equilibrium LU5: Gravimetric Methods LU6: Acid-Base Equilibria LU7: Acid-base titrations LU8: Analytical Separations Course Assessment Laboratory reports (15%) ï‚â€" Assignments (15%) ï‚â€" MidTerm Examination (30%) ï‚â€" Final Examination (40%) ï‚â€" 3 References 1. Christian, G.D. (2003)Read MoreBiodegradation of Hydrocarbons from Crude Oil by Pseudomonas Putida4958 Words   |  20 PagesStrain 5.3 Preparation of SubCultures of Bacterial Strain 5.4 Centrifugation of Crude Oil 5.5 Subculturing Of Petri Plates with oil 5.6 Biodegradation Studies 5.7 Gravimetric Analysis 6. Results 6.1 Growth Analysis of Pseudomonas Putida 6.2 Gravimetric Analysis 7. Discussion 8. References 1. ABSTRACT Oil spills have become a serious problem with the ever-increasing resource exploitation, transportation, storage, and accidental leakageRead MoreContamination of the Turag River19368 Words   |  78 Pagesdifferent water quality parameters due to season change, i.e. dry and wet season 4. To assess the heavy metal contamination of the sediment of the Turag River 5. To analyze the Sediment quality of the river bed 6. Comparison of the data analysis according to different national and international standards If the sources of major waste disposal outlets into the Turag River can be taken care of, it is firmly expected that the river can get relieve from pollution to a great extent. So, it