Ka Lab - Samuel Castrejon Period 1 Mr. Cain Ap Chemistry Ka...

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Samuel Castrejon Period 1 Mr. Cain Ap Chemistry Ka Lab Results Table 1.1 : pH of Weak Acids Titrated With An Unknown Concentration of Sodium Hydroxide (NaOH) Acid Trial 1 Trial 2 Trial 3 Average Citric Acid 12.20 11.74 11.84 11.92 Benzoic Acid 12.41 12.22 12.41 12.35 KHP 11.73 11.70 11.88 11.77 The acids were each dissolved in a beaker filled with 50.0 mL of water and then each 50 mL beaker of the solution was split evenly into two different beakers. One of the two beakers was titrated using NaOH until the solution turned pink, and the concentration of the NaOH was not recorded. Once the solution was titrated, the other beaker added to the titrated solution, and then the pH was recorded using a pH probe. Table 1.2 Experimental Ka of Weak Acids after Titration Acid Ka Citric Acid 1.20 x 10 -12 Benzoic Acid 4.45 x 10 -13 KHP 1.70 x 10 -12 Benzoic acid has the lowest experimental Ka value, while Citric Acid had the highest experimental Ka value. Table 1.3 Experimental pKa values of Weak Acid
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This note was uploaded on 03/19/2012 for the course ECON 103 taught by Professor Mr.sir during the Spring '12 term at Universidad de Granada.

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Ka Lab - Samuel Castrejon Period 1 Mr. Cain Ap Chemistry Ka...

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