? What is the molar concentration of the prepared KOH solution? ? Calculate for the grams of Malic acid in the 100.0 mL wine sample? ? What is the percent by mass Malic acid in the 100.0 mL wine sample?
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) + 2H2O (l)
Assume the density of the wine sample is 1.000 g/mL
MM of KHP = 204.22 g/mol
MM of C4H6O5 = 134.0874 g/mol
|
Step by step
Solved in 2 steps with 2 images
