Procedure and Dilution Take a 10ml volumetric flask, grab...

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Lab 5: Calibration Methods and Introduction to UV-Visible Spectroscopy Pre-Lab Questions 1. ( 1 mg Solute 1 LSolvent )( 100.0 ppm 1 ) = 100 mg solute, which is 0.1000g ( 2 mL HCl 100 mL HClsolution )( 1000 mL HCl solution 1 L ) = 20 mL concentrated HCl Description: a. Weigh approximately 0.1000g of the pure ASA. b. Place it in a 1000mL volumetric flask. c. Measure 20mL of the concentrated HCl. d. Add it into the volumetric flask. e. Fill it to the shoulder of the container with DI water 2. Table C1V1=C2V2 V2= C 1 V 1 C 2 Concentration (ppm) Volume Added of ASA (mL) 0ppm 0µl 4ppm 400 µl 6ppm 600 µl 8ppm 800 µl 10ppm 1000 µl 15ppm 1500 µl 20ppm 2000 µl 100ppm 10000 µl
3. Procedure and Dilution Take a 10ml volumetric flask, grab 325mg ASA using the balance and pour it into the flask to make the known final concentration to 10.00ppm. Add to the 10ml volumetric flask, the same volume of the aspirin tablet solution. Then dilute to the mark with 2%HCl. 2
Post Lab Questions 1. Table of results after Grubb’s test

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