Chemistry Practice Problems Weak Acid Strong Base Titrations Practice Problems Solution: Lactic acid is a common by-product of cellular res...

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# Solution: 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.

###### Problem

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.

Weak Acid Strong Base Titrations

Weak Acid Strong Base Titrations

#### Q. Consider the titration of 100.0 mL of 0.100 M HCN by 0.100 M KOH at 25°C. (K  a for HCN = 6.2 x 10-10.)c. Calculate the pH after 75.0 mL of KOH has be...

Solved • Thu Nov 08 2018 16:31:48 GMT-0500 (EST)

Weak Acid Strong Base Titrations

#### Q. Calculate the pH at the halfway point and at the equivalence point for each of the following titrations.a. 100.0 mL of 0.10 M HC7H5O2 (Ka = 6.4 x 10-5...

Solved • Wed Nov 07 2018 18:37:14 GMT-0500 (EST)

Weak Acid Strong Base Titrations

#### Q. Consider the titration of 100.0 mL of 0.200 M acetic acid (Ka = 1.8 x 10  -5) by 0.100 M KOH. Calculate the pH of the resulting solution after the fol...

Solved • Wed Nov 07 2018 18:13:54 GMT-0500 (EST)

Weak Acid Strong Base Titrations

#### Q. Calculate the pH at the following point in a titration of 40 mL (0.040 L) of 0.100 M barbituric acid (Ka = 9.8 × 10−5) with 0.100 M KOH.(a) no KOH add...

Solved • Wed Nov 07 2018 10:17:16 GMT-0500 (EST)