Rei and Akari, two vinegar enthusiasts, are each tasked to determine the acetic acid content of their respective vinegar concoctions by titration. First, a 1 M-labeled KOH solution was standardized against the KHP (MW = 204.22 g/mol) standard that is 99.4% pure. In the process, 0.540 g KHP was found to require 2.80 mL of the KOH solution to completely react up to the phenolphthalein endpoint. Then, Rei and Akari both prepared their samples by taking 10.0-mL aliquots of each vinegar and diluting them to 25.0 mL. Using the same titrant and indicator, Rei’s vinegar required 18.60 mL of the standardized titrant to reach the endpoint, while Akari’s vinegar required 16.50 mL of the same titrant to reach the same endpoint. What is the exact concentration of the KOH titrant in molarity? What is the balanced chemical equation between the analyte and the titrant? What is the color transition (color X color Y) expected throughout the course of titration?
Rei and Akari, two vinegar enthusiasts, are each tasked to determine the acetic
acid content of their respective vinegar concoctions by titration. First, a 1
M-labeled KOH solution was standardized against the KHP (MW = 204.22 g/mol)
standard that is 99.4% pure. In the process, 0.540 g KHP was found to require
2.80 mL of the KOH solution to completely react up to the phenolphthalein
endpoint. Then, Rei and Akari both prepared their samples by taking 10.0-mL
aliquots of each vinegar and diluting them to 25.0 mL. Using the same titrant and
indicator, Rei’s vinegar required 18.60 mL of the standardized titrant to reach the
endpoint, while Akari’s vinegar required 16.50 mL of the same titrant to reach the
same endpoint.
What is the exact concentration of the KOH titrant in molarity?
What is the balanced chemical equation between the analyte and the titrant?
What is the color transition (color X color Y) expected throughout the
course of titration?
What is the acetic acid concentration of Rei’s and Akari’s vinegar in molarity?
If the legal minimum acetic acid content in vinegar is 1.50 M, which of the two
vinegar enthusiasts – Rei, Akari, or BOTH – are allowed to sell their vinegars
for business?
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