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Problem: What is the molar concentration of the hydroiodic acid in an available solution?

What are the errors occur in the procedure. Identify each error

Screen Shot 2018-08-08 at 1.46.22 PM.png

Screen Shot 2018-08-08 at 1.46.22 PM.png

Problem: What is the molar concentration of the hydroiodic acid in an available solution? Experimental design: The hydroiodic acid in the available solution is titrated with a standard solution of potassium hydroxide. The colour change of bromcthymol blue
indicator to green indicates the equivalence point. 21. The following titration procedure is provided for the described experiment. Three errors
occur in the procedure. Identify each error and provide the corrected procedural steps. Obtain T0 to 00 mL of potassium hydroxide solution in a clean beaker. Obtain T0 to 80 mL of hydroiodic acid solution in a clean beaker. Set up the burette to contain the hydroiodic acid solution. Record the initial burette reading. Pipette a 10.00 mL sample of hydroiodic acid into a volumetric flask. Add 2-3 drops of bromothymol blue indicator.
Slowly add the titrant to the sample solution until a subtle colour change has occurred. Swirl vigorously.
Record the final burette reading. Dispose contents of the flask safely and clean the flask. Repeat steps 4 to 7 until you obtain three consecutive trials within 0.5 to 1.0 mL of
each other. P‘PP'E‘JT‘ F" 559°?”

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