A commercial vinegar was analyzed by titration to determine the percent acetic acid. Briefly, 10.00 mL of vinegar sample was diluted to 100. mL solution in volumetric flask. A 25.00 mL aliquot from the diluted vinegar required 25.55 mL of 0.1005 M NaOH to reach the phenolphthalein endpoint. Which is the correct equation between the analyte and titrant reaction?       CH3COOH + NaOH → NaCH3COO + H2O     2CH3COOH + NaOH → NaCH3COO + H2O     C20H14O4 + NaOH → NaC20H14O4  + H2O     CH3COOH + 2NaOH → NaCH3COO + H2O

Chemistry
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ISBN:9781305957404
Author:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste
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Chapter1: Chemical Foundations
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  1. A commercial vinegar was analyzed by titration to determine the percent acetic acid. Briefly, 10.00 mL of vinegar sample was diluted to 100. mL solution in volumetric flask. A 25.00 mL aliquot from the diluted vinegar required 25.55 mL of 0.1005 M NaOH to reach the phenolphthalein endpoint.

    Which is the correct equation between the analyte and titrant reaction?

     

       

    CH3COOH + NaOH → NaCH3COO + H2O

       

    2CH3COOH + NaOH → NaCH3COO + H2O

       

    C20H14O4 + NaOH → NaC20H14O4  + H2O

       

    CH3COOH + 2NaOH → NaCH3COO + H2O

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A sodium hydroxide (NaOH) solution was standardized with KHP primary standard. The concentration was found to be 0.1022 M. What is the concentration of a 25.0-ml hydrochloric acid (HCl) solution if it required 32.6 ml of NaOH to reach the phenolphthalein end point?

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