CHE Lab Exam July 07 - Students name : ID: School of...

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Student’s name : ID: School of Science and Engineering CHE1400 Laboratory Sessions Final Exam July 17 th 2007. Duration: 60min The clarity of the answers and of the answer sheets will be considered. 1. Give a brief definition of “Boiling point” and “Melting point”. Why should we consider more that one property to define an determine elements? 2. Write the dissociation reaction in water and determine the theoretical pH values of the following acids and base solutions: HCl : 0.05M NaOH : 0.15M 3 . To determine the pH value of CH3COOH, we use the following formula: pH = -Log [CH3COOH] x Ka Write the dissociation reaction in water of this weak acid and explain how we can get down to this formula. 1
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Student’s name : ID: 4. In order to compare the efficiency of two antacids, you are given the following solutions: HCl : 4M; NaOH : 1M; Phenolphthalein and two Antacids : brand A and brand B. 40ml of NaOH were necessary to neutralize 10 ml of HCl
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This note was uploaded on 10/18/2009 for the course HBFSJFI ges2302 taught by Professor Inkla during the Spring '09 term at École Normale Supérieure.

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CHE Lab Exam July 07 - Students name : ID: School of...

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