The grams and %w/w of Malic acid present in the 200.0 mL wine sample

Chemistry
10th Edition
ISBN:9781305957404
Author:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste
Publisher:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste
Chapter1: Chemical Foundations
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Problem 1RQ: Define and explain the differences between the following terms. a. law and theory b. theory and...
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Malic acid (C4H6O5) is a dicarboxylic acid that naturally occurs in the production of bignay wine. Maria was tasked to find out the acid content in a 200.0 mL wine sample by titrating it with a standardized solution of KOH. He was able to establish the working concentration of the KOH solution by using 39.12 mL of it to titrate a primary standard of KHP that weighed 3.021 g. The grams and %w/w of Malic acid present in the 200.0 mL wine sample were then determined by titrating a 20.00 mL aliquot using 48.95 mL of the standardized KOH solution.

 

C4H6O5 (aq) + 2KOH (aq) ↔ K2C4H4O5 (aq) + 2H2(l)

 

Assume the density of the wine sample is 1.000 g/mL

MM of KHP = 204.22 g/mol

MM of C4H6O= 134.0874 g/mol

                                                                                                                                                   

What is the molar concentration of the prepared KOH solution?

 
                                                                                                                                                   

Calculate for the grams of Malic acid in the 100.0 mL wine sample?

 
                                                                                                                                                    A.

1.241

  B.

5.624

  C.

0.4175

  D.

0.3187

  E.

0.4517

  F.

1.365

  G.

3.165

  H.

2.114

  I.

6.502

  J.

0.3781

  K.

5.462

  L.

6.205

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