PostLab9LD - The Nature of Acids and Bases - Who's Strong...

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The Nature of Acids and Bases - Who's Strong and Who's Weak? Excel Template Chem1310 Laboratory (C) 2003-2007 Tatsuya Maehigashi Chem1310 Margin Name: Lindsey DeRosa Partner's Name: Alyssa Freeman Section: C-2 Date of Experiment Performed: 10/22/2007 Date of Report Prepared: 10/30/2007 The Nature of Acids and Bases - Who's Strong and Who's Weak? A. Understanding pH Indicators Tabulated Data/Results Endpoint Determination HIn, Acid Form In - → HIn Weak Acid Indicator Color pH Color pH Color pH Ka Color pH Ka Phenolphthalein clear 4.89 fuschia 5.62 clear 6.15 7.1E-07 7.1E-08 fuschia 6.81 1.5E-07 1.5E-08 1.00E-10 Methyl Orange light yellow 6.09 light peach 3.68 light yellow 4.51 3.1E-05 3.1E-06 light peach 3.77 1.7E-04 1.7E-05 1.00E-08 Bromethymol Blue yellow 5.83 bright blue 5.06 yellow 4.93 1.2E-05 1.2E-06 bright blue 5.25 5.6E-06 5.6E-07 1.00E-07 Universal Indicator pale yellow 6.18 pink 5.13 purple 6.06 8.7E-07 8.7E-08 pale yellow 5.85 1.4E-06 1.4E-07 1.00E-06 Supporting Calculations B. Acid and Base Strength pH Paper Univ. Indicator pH Meter Tabulated Data/Results <B-2> Margin Margin Tabulated Data/Results <B-3> pH Paper Univ. Indicator pH Meter Product/Compound Dilution Color pH [H+] %Dissoc
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This note was uploaded on 04/20/2008 for the course CHEM 1310 taught by Professor Cox during the Fall '08 term at Georgia Institute of Technology.

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PostLab9LD - The Nature of Acids and Bases - Who's Strong...

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