Lab Report 7 - pH Volume of NaOH added at inflection point:...

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John Xu 4/13/07 Lab Report Experiment 7: pH Titrations of Strong and Weak Acids 1. HCl molarity based on color change data: Concentration of NaOH: 0.0993 M HCl + NaOH H 2 O + NaCl 1 : 1 molar ratio Moles NaOH = Moles HCl Moles = Molarity * Volume 0.0102 L NaOH at end-point (0.0993 M NaOH) (0.0102 L NaOH) = ( x M HCl) (0.0100 L) [HCl] = 0.101 M CH 3 CO 2 H molarity based on color change data: CH 3 CO 2 H + NaOH H 2 O + NaCH 3 CO 2 1 : 1 molar ratio Moles NaOH = Moles CH 3 CO 2 H 0.00102 L NaOH at end-point (0.0993 M NaOH) (0.0102 L NaOH) = ( x M CH 3 CO 2 H) (0.0100 L) [CH 3 CO 2 H] = 0.101 M 2. HCl molarity based on pH data: Titration of HCl Using NaOH 0 2 4 6 8 10 12 14 0 2 4 6 8 10 12 14 Volume NaOH Added (mL)
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Unformatted text preview: pH Volume of NaOH added at inflection point: 0.0104 L (0.0993 M NaOH) (0.0104 L NaOH) = ( x M HCl) (0.0100 L) [HCl] = 0.103 CH 3 CO 2 H molarity based on pH data: Titration of Acetic Acid Using NaOH 2 4 6 8 10 12 14 5 10 15 20 Volume NaOH Added (mL) pH Volume of NaOH added at inflection point: 0.0103 L (0.0993 M NaOH) (0.0104 L NaOH) = ( x M CH 3 CO 2 H) (0.0100 L) [CH 3 CO 2 H] = 0.103 M 3. No, the determined molarities are not the same for HCl. They differ by 0.002 M No, the determined molarities are not the same for CH 3 CO 2 H They differ by 0.002 M...
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Lab Report 7 - pH Volume of NaOH added at inflection point:...

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