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A: Synthesis of Chrysin is as follows:
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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?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. What is the lactic acid concentration (in M) of the titrated sample?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) a. 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?
- 10.0 mL of 0.100 M HCl solution was added to 20.0 mL of 0.100 M (CH3CH2)3N (triethylamine). Kb (CH3CH2)3N = 5.2 x 10–4 Determine the following: a) Concentration of (CH3CH2)3N that did not react with acid. b) Concentration of (CH3CH2)3NH+ formed from the reaction with acid. c) pOH.0.02 M NaOH reagent was standardized using 0.1000 g Potassium hydrogen phthalate (204.22 g/mol) and it required 25.8 mL to reach end point.This is the answer I got for this problem, but It's saying I have the change in concentration wrong. I don't understand what the help prompt is saying here. I also have Ka = 2x/(0.015-x) = 0.0003 Is that correct? It didn't fit on the snip I took, sorry.
- Please do not copy answers from other chegg questions. Please explain your step-by-step process and show all work. 1. You have been provided with the following solution: 0.2M NaOH and 0.2M acetic acid How much volume of each will be needed to make a 500 mL 0.1M acetate buffer of pH 5.2? The pK of acetic acid is 4.761. What would you observe in procedural step 2 under flowcharts if 6M HNO3 were used in place of 6M HCL?Bonus (2 points) Buffer solutions resist dramatic changes in pH due to the presence of a weak acid-conjugate base pair present in the solution. However, the combination of 20.0mL of 0.30M HC2H3O2 and 10.0mL of 0.30M NaOH also produces an excellent buffer solution. How? Provide a thorough explanation that explains the apparent discrepancy. (Using calculations and reactions to support your explanation is encouraged. Feel free to use another page if additional space in needed.) The Ka of HC2H3O2 is 1.8x 10-5.
- 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.a) When considering the overall dialysis procedure, why is it important to exchange old/used dialysis buffer (or “dialysate” solution) with a fresh dialysis buffer solution at least once throughout the process? NOTE: Your TAs will do this for your group’s samples over the next week. b) This week’s lab utilizes a dialysis buffer with the following composition: 10 mM Tris-HCl, 10 mM MgSO4, and a pH of 7.4. Let’s presume an ERROR occurred with the creation of this buffer during the pH titration and you unknowingly titrated to a final pH of 5.0. What effects, if any, could you expect to observe on your final, dialyzed sample?For acid-base extractions: Explain what result would you expect if you accidentally extracted the mixture in the reverse order (HCl, NaOH, NaHCO3)? [instead of using NaHCO3 first, NaOH second, and then HCl third]