Instructions A 11.00 gram sample of Vodka was analysed for alcohol content. The sample was placed in a 300 mL volumetric flask and made to the mark with distilled water. A 20.0 mL aliquot of the diluted Vodka was taken from the volumetric flask and placed in a conical flask containing some distilled water from a previous washing. The 20.0 mL aliquots were titrated against a 0.1302 M Cr2072 solution and an average titre of13.25 mL was obtained. The reaction between the alcohol and the dichromate solution is given below 2Cr207- (ag) + 3CH3CH20H(ag) + 16H*( 3CH3COOH(aq) + 11H2O(1) a) Calculate the amount in mol of Cr2072- in the average (aq) M 4C13"(aq) + titre. b) Calculate the percentage, by mass, of ethanol in the vodka.

Instructions A 11.00 gram sample of Vodka was analysed for alcohol content. The sample was placed in a 300 mL volumetric flask and made to the mark with distilled water. A 20.0 mL aliquot of the diluted Vodka was taken from the volumetric flask and placed in a conical flask containing some distilled water from a previous washing. The 20.0 mL aliquots were titrated against a 0.1302 M Cr2072 solution and an average titre of13.25 mL was obtained. The reaction between the alcohol and the dichromate solution is given below 2Cr207- (ag) + 3CH3CH20H(ag) + 16H*( 3CH3COOH(aq) + 11H2O(1) a) Calculate the amount in mol of Cr2072- in the average (aq) M 4C13"(aq) + titre. b) Calculate the percentage, by mass, of ethanol in the vodka.

Fundamentals Of Analytical Chemistry

9th Edition

ISBN:9781285640686

Author:Skoog

Publisher:Skoog

Chapter13: Titrations In Analytical Chemistry

Section: Chapter Questions

Problem 13.5QAP

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