LabReport2.pdf - Using Gravimetric Analysis to Determine Percent Sulfate By Brandon Carter Lab Partner Angeline Chen Introduction Purpose Statement For

LabReport2.pdf - Using Gravimetric Analysis to Determine...

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Using Gravimetric Analysis to Determine Percent Sulfate By Brandon Carter Lab Partner: Angeline Chen Introduction Purpose Statement: For this lab, you want to determine the percent of sulfate of your assigned sample by precipitating it into an insoluble salt. Using the mass of the precipitate as well as stoichiometry, calculate the percent sulfate using gravimetric analysis. Background: In this lab hydrates containing sulfate are going to be used in order to determine the percent sulfate in that solution. Hydrates are defined as a substance that contain either water or the continuent elements of water. With the experiment as well, gravimetric analysis will be utilized in order to determine the percent sulfate in your specific hydrate. Gravimetric analysis is considered to be a technique used to determine, and thus compare, the measurements of the mass of two compounds containing a specific analyte, which in this case is the sulfate. Procedures; 1. Number each of the 5 100 x 13 mm test tubes, then determine the mass of each of the clean and dry test tubes and record the data in a table 2. Pre-mass about .25 g of your sample on a piece of properly folded weighing paper and transfer substance to a massed test tube. Be certain that no sample contains less than .1g or greater than .3g of the sample 3.Find the mass of each test tube with the sample (use the small beaker to help) and record the data 4. Using one milliliter (around 20 drops) of water in each test tube, dissolve the crystals completely. Slightly heat test tubes in water bath (using 250 mL beaker). If the crystal don’t dissolve within a few minutes. The instructor demonstrated mixing in a test tube. Make sure to not use a stirring rod.
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