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- In order to obtain 3.500 % of acetic acid, what weight of a sample must have been taken for analysis if the vinegar requires 20.50 mL of 0.1150 N KOH solution for an end point of phenolphthalein indicator? Note: - Please make it handwritten - Also, include up to 4 decimal places in computing Thank you!Benzoic acid extracted from 123.16 g of sample required a 27.13 mL titration with 0.0792 M barium hydroxide. What is the percent benzoic acid in the sample?Two aliquot of a water sample is titrated against a strong acid using phenolphthalein and bromocresol green indicator. The volume for the phenolphthalein endpoint and for the bromocresol green endpoint are equal, what is/are the probable source of alkalinity? a) Hydroxide b) Bicarbonate c) Carbonate d) Both Hydroxide and Carbonate In addition, what would be the probable source of alkalinity if the volume for bromocresol green endpoint is 13.5mL and there was no phenolphthalein endpoint?
- 5..A 2.25 g sample of butter was refluxed with ethanolic KOH and required 18.6 mL of 0.1978 M HCl to reach the phenolphthalein endpoint. If the blank determination 47.1 mL of the same standard acid, a. Calculate the saponification value of the sample b. Assuming that the sample comprised mainly of fat, what is its molar mass?In the procedure below for a weak diprotic acid titation experiment what are the independent, dependent, and controlled variables? Prepare your Buret• Condition a 50 mL buret (2x with DI H2O followed by 2x standardized NaOH)• Fill the buret with the standardized NaOH close to but not exactly 0.00 mL Prepare Your Analyte • Your analyte will need to be placed in a 250 mL beaker and should contain thefollowing:*0.5 – 0.75 g KHP** About 100 mL DI water* Magnetic stir bar• Once all contents are in the 250 mL beaker, stir for at least 5 minutes to dissolve. Ifneeded, add a bit more water.* For unknown diprotic acids, use the mass provided by the instructorNext Run the Titration (note you will need to run the titration several times for data collection so you are able to use the average molar mass to find the unknown diaprotic acid).
- For strong acid and weak base titration,methyl orange is a suitable indicator whereas phenolphthalein is not.Justify the statement.Can equivalence point be determined experimentally?kindly help me with this problem thank youu!!1 Use floating decimal in your solutions but express all final answers to four (4) decimal places and enclose them in a box.In conductometric titration of strong acid with the strong base and weak acid with strong base the similarity is: A: decrees in conductance before end the point B: decrees in conductance after the end point C: increase in conductance before the end point D: increase in conductance after the end point
