CHM exp report 8 - CHM 151 Experiment Report Student's name...

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CHM 151 Experiment Report Student’s name : Lai Shin Zie ID : I08001607 Partner’s name : Nicholas Chai ID : I08001107 Section : 5A Lecturer’s name : Dr. Palsan A/L Sannasi @ Sannach Due date : 11 July 2008
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13 June 2008 Experiment 8 : Acid-Base Titration Aim : 1. To determine the standardization of NaOH solution. 2. To determine the p K a of unknown monoprotic acid. 3. To determine the concentration of unknown monoprotic acid. Procedure : Please refer to the laboratory manual page 60-62. Table 8.1 Standardization of NaOH solution Experiment Volume of KHP (mL) Burette Reading (mL) Volume of NaOH (mL) Final Initial Trial 25 24.4 50 25.6 1 25 24.0 50 26.0 2 25 23.9 50 26.1 3 25 23.7 50 26.3 1. Calculate the molarity of the NaOH solution for four significant figures. Average volume of NaOH used = = 26 mL Molarity of NaOH = = 0.09615 M
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Table 8.2 Determination of p K a of unknown monoprotic acid Initial pH : 2.23 Initial burette reading (mL) : 0 Burette reading (mL) Volume of NaOH added (mL) pH Burette reading (mL) Volume of NaOH added (mL) pH Burette reading (mL) Volume of NaOH added (mL) pH 1 1 2.48 34 1 4.61 61.6 1 12.29 2 1 2.71 35 1 4.68 62.6 1 12.31
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CHM exp report 8 - CHM 151 Experiment Report Student's name...

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