Exercise Consider the following potentiometric titration data for acetic acid solution against sodium hydroxide solution. Use the following data to: (a) Plot the pH of solution vs. Volume of NaOH (VNaOH)added using the guidelines stated earlier in the session (b) Calculate the first derivative of the titration curve of CH3COOH (c) Plot the first derivative of pH vs. VNaOH, and determine the end point of titration PH AV APH first derivative= VSOH (mL) 0.0 2.0 4.0 10.0 = 12.0 14.0 15.0 15.5 15.6 15.7 15.8 16.0 17.0 18.0 20.0 24.0 Endpoint = 15.62 ml Endpoint = 15.20 ml Endpoint = 15.66 ml CH3COOH(aq) + NaOH(aq) → CH3COONa (aq) + H₂O(l) Endpoint 15.50 ml 2.89 4.52 5.06 5.89 6.15 6.63 7.08 7.75 8.40 9.29 10.07 10.65 11.34 11.63 12.00 12.41 АРН ΔΙ'

Exercise Consider the following potentiometric titration data for acetic acid solution against sodium hydroxide solution. Use the following data to: (a) Plot the pH of solution vs. Volume of NaOH (VNaOH)added using the guidelines stated earlier in the session (b) Calculate the first derivative of the titration curve of CH3COOH (c) Plot the first derivative of pH vs. VNaOH, and determine the end point of titration PH AV APH first derivative= VSOH (mL) 0.0 2.0 4.0 10.0 = 12.0 14.0 15.0 15.5 15.6 15.7 15.8 16.0 17.0 18.0 20.0 24.0 Endpoint = 15.62 ml Endpoint = 15.20 ml Endpoint = 15.66 ml CH3COOH(aq) + NaOH(aq) → CH3COONa (aq) + H₂O(l) Endpoint 15.50 ml 2.89 4.52 5.06 5.89 6.15 6.63 7.08 7.75 8.40 9.29 10.07 10.65 11.34 11.63 12.00 12.41 АРН ΔΙ'

Appl Of Ms Excel In Analytical Chemistry

2nd Edition

ISBN:9781285686691

Author:Crouch

Publisher:Crouch

Chapter8: Polyfunctional Acids And Bases

Section: Chapter Questions

Problem 10P

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The data from my observations is given below: Concentration of Standardized NaOH - 1.00 mol/L Mass concentration of acetic acid - 2.40 g/L Trial 1 Trial 2 Measured pH of the acetic acid solution 3.07 3.05 Mass of acetic acid solution taken for titration 20.0 g 20.0 g Initial buret reading of NaOH titrant 0.00 mL 0.00 mL Final buret reading of NaOH titrant 0.82 mL 0.79 mL Net volume of NaOH 0.82 mL 0.79 mL Millimoles of NaOH to end point of titration 0.82 mmol 0.79 mmol Millimoles of acetic acid in sample 0.82 mmol 0.79 mmol Molar concentration of acetic acid solution 0.043 mol/L 0.041 mol/L Calculated molar mass of acetic acid g/mol g/mol Average molar concentration of acetic acid for the samples titrated: 0.042 mol/L Average pH: 3.06 Question: Calculate the corresponding [H3O+], compute the corresponding concentration of A- and HA, and calculate the dissociation constant Ka Thank you!
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