BIO315H5 Study Guide - Midterm Guide: Fume Hood, Potassium Iodate, Burette
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Experimental method2: using a burette, 20ml solution of kbro3 was measured and transferred into a 250ml. Since the titration was done accurately, the solution changed into a deep blue color. From conducting the experiment, the following data was obtained. Table 1. 1 volume of kbro3 titrated with na2s2o3 (for more details, refer to appendix) Number of moles of na2s2o3 and kbro3 was calculated using where n" is the number of moles and m" is the molarity of the given solution and v" is the volume of the given solution1. + 9i- + 6h3o+ br- + 3 i3. + 6h3o+ br- + 9h2o + 3s4o6. By adding equation and equation , the following observations were made. Reacts to give 3 moles of i3. By factoring the above observations into the reaction, the excess moles of bro3. Using the same steps as listed above, the excess kbro3 was calculated for trial #2 and trial #3 and the results are summarized as follows:
