Read the detailed procedure of an experiment in your screen. Evaluate each step in the procedure whether it belongs to HOMOGENIZATION, EXTRACTION, PURIFICATION/CONCENTRATION, DATA TREATMENT, or INSTRUMENTAL ANALYSIS step. Data SheetTask No. 7DETERMINATION OF SULFUR CONTENT IN A SOLUBLE SULFATE SALTThe sample was powdered using a mortar and pestle. This step was cautiously performed inorder to avoid spillage and loss of the sample.aThe ground sample was transferred in a properly labelled container and dried for about two(2) hours inside the oven at 103°C. The dried sample was then cooled and stored in abdesiccator.About 0.5 to 0.8 grams of the dried sample was weighed using a weighing boat andtransferred it to a labelled beaker. This step was repeated to make four (4) trials.About 200 ml of distilled water was used to dissolved the sample and 1 ml of concentratedHCl was added into the sample solution using a pipet. This solution was heated near boilingpoint using a hot plate or Bunsen burner.A 25 ml of hot barium chloride was poured gently and carefully into the hot sample solutionwith vigorous stirring. The precipitating agent was poured gently to reduce the Q therebyreducing the relative supersaturation of the solution.deHeating the reagents near boiling point was also necessary to increase the solubility, thusreducing the relative supersaturation.fVigorous stirring would also help in breaking the electric double layer and prevent theformation of colloidal particles. The precipitate was then allowed to settle at the bottom ofthe beaker.hThe supernatant liquid was tested for completeness of precipitation by adding a few moredrops of hot barium chloride solution. If supernatant liquid turns cloudy upon contact of theadded drops of precipitating agent, the precipitation is not yet completed and the hot bariumchloride solution must be added until the cloudy precipitate disappears.iWhen the precipitation is complete, the beakers were covered with watch glass and thesolution was digested and kept hot (80 to 90°C) for 1 to 2 hours over a low heat setting usinga hot plate.After digestion, the solution was allowed to cool down. The beakers were then covered with ashrink-wrap and kept in a locker until the next laboratory class schedule. This step wasnecessary to enhance the crystallization of the precipitate.jThe precipitate from one beaker was collected in an ashless filter paper. The beaker wasrinsed thoroughly to ensure that all precipitates was transferred into the filter paper. Thesame step was also done for the rest of the replicates. The precipitate was washed with hotwater three times.The last few drops of the filtrate were then collected into a test tube and tested for thepresence of the chlorides by adding 1 drop of 0.1 M AGNO3 into the test tube. If a cloudysolution appears, the chloride is still present with the precipitate and washing it with hotwater must be repeated until the cloudy solution no longer appears.The filter paper containing the precipitate was then removed from the filter funnels, folded toclose the opening and placed insides its corresponding constant weighed crucible. Thecrucibles were placed inside the muffle furnace. The covers of the crucibles were left slightlyajar to allow air inside the crucibles. The lid of the furnace was closed and the furnace wasproperly set for precipitate ignition. The temperature for the drying stage was set at 110°C for30 minutes; the charring stage was set at 550°C for 1 hour; and the ignition stage was set atm800°C for another 1 hour.On the next day, with the furnace already cooled down, crucibles were removed using agloved hand to avoid spilling the contents of the crucible. The precipitate was check andfound out that it was a white ash-like material.nThe constant weighing procedure was then performed but crucible tongs were used insteadof a glove hand to prevent burns and getting other materials onto the crucibles.All measurement and weighing were recorded in a laboratory notebook. Other informationsuch as molar mass and precipitation reaction was also determined and noted. Thegravimetric calculations were then performed to find out the sulfur content in the sample.The average and standard deviation of the replicates were also calculated and the final resultwas present.PURIFICATION/CONCENTRATIONHOMOGENIZATIONEXTRACTIONDATA TREATMENTINSTRUMENTAL ANALYSIS

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Now, Below are the methods mentioned evaluating the steps,