ACID-BASE TITRATION PRELAB QUESTIONS NAME niee uera 1. A 4.00 mL sample of vinegar (active ingredient, acetic acid) was titrated with 0.1250M NaOH according to the following equation: HC2H3O2 NaOH NaC2H3O2 HOH 25.19 mL of base was needed to reach the end point. Calculate the molarity of the acetic acid of acetic acid in one liter of the vinegar. 2. Calculate the grams of vinegar in grams The 4.00 mL sample of vinegar had a mass of 4.056 g. Calculate the 3. one liter. Calculate the % acetic acid in the vinegar. 4. g acetic acid g vinegar x 100 % acetic acid = 95

ACID-BASE TITRATION PRELAB QUESTIONS NAME niee uera 1. A 4.00 mL sample of vinegar (active ingredient, acetic acid) was titrated with 0.1250M NaOH according to the following equation: HC2H3O2 NaOH NaC2H3O2 HOH 25.19 mL of base was needed to reach the end point. Calculate the molarity of the acetic acid of acetic acid in one liter of the vinegar. 2. Calculate the grams of vinegar in grams The 4.00 mL sample of vinegar had a mass of 4.056 g. Calculate the 3. one liter. Calculate the % acetic acid in the vinegar. 4. g acetic acid g vinegar x 100 % acetic acid = 95

Fundamentals Of Analytical Chemistry

9th Edition

ISBN:9781285640686

Author:Skoog

Publisher:Skoog

Chapter14: Principles Of Neutralization Titrations

Section: Chapter Questions

Problem 14.32QAP

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Maleic acid (H2C4H2O4, represented by H2M) is the precursor of malic acid widely used in industry. food as an acidulant and in the pharmaceutical industry it is used in the treatment of wounds. This acid can be determined by neutralization titration. Answer the items below about this determination. a) Considering a 15.0 mL sample of maleic acid-based product used in industry, determine the maleic acid concentration, in mol/L, in the sample knowing that 21.7 mL of a solution of 0.1120 mol/L NaOH for complete neutralization of this acid. How many grams of maleic acid were in the sample analyzed and what is its percentage (%, m/v) in the sample? [Answer; m=0.1405 mol/L; percentage = 0.9365%] NaOH(aq) + H2M(aq) ----> Na2M (aq) + H2O(l) b) And Suggest an appropriate indicator for the titration of this acid by looking at the titration curve profile below (image)
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