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.

Principles of Instrumental Analysis

7th Edition

ISBN:9781305577213

Author:Douglas A. Skoog, F. James Holler, Stanley R. Crouch

Publisher:Douglas A. Skoog, F. James Holler, Stanley R. Crouch

ChapterA1: Evaluation Of Analytical Data

Section: Chapter Questions

Problem A1.22QAP

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