12 10 8 Hd Hu 6 4 2 0 0 4 8 12 16 20 24 28 32 36 Volume Base Added (mL) 8A. What was in the Erlenmeyer flask (conical flask)? o Acid or Base 8B. Estimate the end point volume of the titration using the titration curve: 8C. At what volume of the added titrant does the pH of the solution equal the pKa? 8D. Estimate the pka of the acid: 8E. Estimate the pH range of the buffer region of the titration:

12 10 8 Hd Hu 6 4 2 0 0 4 8 12 16 20 24 28 32 36 Volume Base Added (mL) 8A. What was in the Erlenmeyer flask (conical flask)? o Acid or Base 8B. Estimate the end point volume of the titration using the titration curve: 8C. At what volume of the added titrant does the pH of the solution equal the pKa? 8D. Estimate the pka of the acid: 8E. Estimate the pH range of the buffer region of the titration:

Fundamentals Of Analytical Chemistry

9th Edition

ISBN:9781285640686

Author:Skoog

Publisher:Skoog

Chapter19: Applications Of Standard Electrode Potentials

Section: Chapter Questions

Problem 19.13QAP

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Fifty cm3 of 1.000 M nitrous acid is titrated with 0.850 M NaOH. What is the pH of the solution (a) before any NaOH is added? (b) at half-neutralization? (c) at the equivalence point? (d) when 0.10 mL less than the volume of NaOH to reach the equivalence point is added? (e) when 0.10 mL more than the volume of NaOH to reach the equivalence point is added? (f) Use your data to construct a plot similar to that shown in Figure 14.10 (pH versus volume NaOH added).
Malonic acid (HO2CCH2CO2H) is a diprotic acid. In the titration of malonic acid w ith NaOH, stoichiometric points occur at pH = 3.9 and 8.8. A 25.00-mL sample of malonic acid of unknown concentration is titrated with 0.0984 M NaOH, requiring 31.50 mL of the NaOH solution to reach the phenolphthalein end point. Calculate the concentration of the initial malonic acid solution. (Sec Exercise 113.)
Lactic acid is a common by-product of cellular respiration and is often said to cause the burn associated with strenuous activity. A 25.0-mL sample of 0.100 M lactic acid (HC3H5O3, pKa = 3.86) is titrated with 0.100 M NaOH solution. Calculate the pH after the addition of 0.0 mL, 4.0 mL, 8.0 mL, 12.5 mL, 20.0 mL, 24.0 mL, 24.5 mL, 24.9 mL, 25.0 mL, 25.1 mL, 26.0 mL, 28.0 mL, and 30.0 mL of the NaOH. Plot the results of your calculations as pH versus milliliters of NaOH added.
In order to determine the concentration of benzylamine (pKa = 9.33) in a urine sample, acid-base titration was performed to 100.0 mL of urine. 20.0 mL of 0.01 mM HCl was used to reach the equivalence point. What is the molarity (in M) of benzylamine? The structure of benzylamine is 2 M 0.000000002 M 0.000002 M 0.002 M 10.0 mL of 0.02 M carbonic acid (H2CO3) is titrated with 0.01 M NaOH. What is the pH of the carbonic acid solution before titration? For carbonic acid, Ka1= 4.2 x 10-7, Ka2=4.3 x 10-11.
The titration of an unknown weak acid with 0.10M NaOH is carried out and the pH at the equivalence point was found to be 8.50. Which indicator is best suited for the analyte? pKa=4.2 a. phenolphthalein pKa=9.7 b. methyl red pKa=5.0 c. methyl orange pKa=4.2 d. cresol purple pKa=8.3
please stop rejecting. we pay for this service, so we deserve getting our answer! I do not want to have to put a claim in and report Use acid-base titration to determine theconcentration of:– A strong acid: HCl 0.100 M NaOH (standardized)•0.100 M HCl0.100 M CH3COOH Phenolphthalein is used for endpoint determination– Changes from colourless to pink as a solution becomes more basic• Only need 2-3 drops per titration• pH range: 8.3-10
Determining the ksp of Calcium Hydrioxides Titration of Calcium Hydroxide with HCl Mass of Erlenmeyer flask: 25.52 g Mass of Erlenmeyer Flask + Calcium Hydroxide Solution (lime water) (g): 28.44 g Mass of Calcium Hydroxide Solution (g): 2.92 g Volume of Ca(OH)2 Density = 1.000 g/mL (mL) - 2.92 mL Concentration of HCl (M) - How do you find this? HCl 0.10 M solution used Initial HCl volume = 0.79 mL Final HCl volume = 0.09 mL volume of HCl delivered = 0.70 mL Moles of HCl delieverd - how do I calculate this? Moles of OH- in sample - how do I calculate this? Moles of Ca2+ in sample - how do I calculate this? Thank you!