Solve for the dissolved oxygen content of the water sample in Day 1 if the Na2S2O3 titrant (0.1152 M) consumed were 10.28 mL, 9.84 mL and 10.02 mL. The volume of the water sample obtained is 30 mL. Assume that the procedure for BOD determination experiment done here is same to our class experiment. 306 ppm 316 ppm 312 ppm 308 ppm

Solve for the dissolved oxygen content of the water sample in Day 1 if the Na2S2O3 titrant (0.1152 M) consumed were 10.28 mL, 9.84 mL and 10.02 mL. The volume of the water sample obtained is 30 mL. Assume that the procedure for BOD determination experiment done here is same to our class experiment. 306 ppm 316 ppm 312 ppm 308 ppm

Appl Of Ms Excel In Analytical Chemistry

2nd Edition

ISBN:9781285686691

Author:Crouch

Publisher:Crouch

Chapter10: Potentiometry And Redox Titrations

Section: Chapter Questions

Problem 8P

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Amy is testing the concentration of muriatic acid (hydrochloric acid) to check that the concentration is within certain limits. She titrated a 15.0 mL sample (diluted by a factor of 10) with a standard sodium hydroxide solution. A volume of 10.00 mL of 0.125 mol/L sodium hydroxide is used to neutralize the acid. a. Calculate the concentration of HCI? Show your work. b. Write down any three steps of the procedure (Past tense, passive form) followed.
100 mL water sample was subjected to DO analysis using the Winkler method. The initial reading of the titrant (0.025 M Na2SO3) in the buret was 2.51 mL. The endpoint was obtained and the final reading was 7.07 mL. A blank was also titrated and 0.75 mL of the titrant was consumed. Compute for the amount of DO (mg/L) in the sample.
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Mola and Rity were tasked to analyze the acidity of a 10.0-mL fermented milk sample diluted with water in a 250-mL volumetric flask. Mola obtained a 15.0-mL aliquot of this solution, diluted it to 50.0 mL, and then titrated this diluted sample. Titration data were given to Rity and she found out that the 50.0-mL diluted sample contains 0.21 mmol of lactic acid. MW: Lactic Acid (90.08) Follow proper significant figure rulesa. What is the lactic acid concentration (in M) of the titrated sample? b. Determine the lactic acid content (in M) of the 10.0-mL fermented milk sample. c. What is the lactic acid concentration (in %w/v) of the 10.0-mL fermented milk sample?
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