Chemistry_1031_day17_030209_actual

Chemistry_1031_day17_030209_actual - GENERAL CHEMISTRY I...

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GENERAL CHEMISTRY I CHE-1031 Dr. Jonathan M. Smith Monday, March 2
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Today ± Acid-base chemistry: titrations ± Gas evolving reactions ± Re-read Chapter 4 (through 4.8) ± Not focusing on oxidation-reduction (4.9) ± Read Chapter 5 sections 1-3
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SEM images of cell aggregates formed between Salmonella cells and (A) SWNTs COOH and (B) MWNTs COOH. Published in: L. Renea Arias; Liju Yang; Langmuir 2009, 25, 3003-3012. DOI: 10.1021/la802769m Copyright © 2009 American Chemical Society Single-walled carbon nanotubes with hydroxyl and carboxylic acid surface groups show antibacterial activity in water and saline solution, but not in buffer or broth solutions.
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Published in: L. Renea Arias; Liju Yang; Langmuir 2009, 25, 3003-3012. DOI: 10.1021/la802769m Copyright © 2009 American Chemical Society
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CHEMISTRY IN SOLUTIONS Chapter 4
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Acid-Base Titrations Tro, Chemistry: A Molecular Approach 6 ± the difficulty is determining when there has been just enough titrant added to complete the reaction ± the titrant is the solution in the burette ± in acid-base titrations, because both the reactant and product solutions are colorless, a chemical is added that changes color when the solution undergoes large changes in acidity/alkalinity ± the chemical is called an indicator ± at the endpoint of an acid-base titration, the number of moles of H + equals the number of moles of OH ± aka the equivalence point
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Titration Tro, Chemistry: A Molecular Approach 7
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Titration 8 The base solution is the titrant in the burette. As the base is added to the acid, the H + reacts with the OH to form water. But there is still excess acid present so the color does not change. At the titration’s endpoint, just enough base has been added to neutralize all the acid. At this point the indicator changes color.
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Tro, Chemistry: A Molecular Approach 9 Example 4.14: The titration of 10.00 mL of HCl solution of unknown concentration requires 12.54 mL of 0.100 M NaOH solution to reach the end point. What is the concentration of the unknown HCl solution?
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This note was uploaded on 05/09/2010 for the course CHEM 1031 taught by Professor Thomas during the Spring '06 term at Temple.

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Chemistry_1031_day17_030209_actual - GENERAL CHEMISTRY I...

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