experiment 17

experiment 17 - concentration was insignificant compared to...

Info iconThis preview shows page 1. Sign up to view the full content.

View Full Document Right Arrow Icon
Josh Ahn Thursday @ 1 The purpose of this experiment was to study the oxidation of ethanol to produce ethanal by potassium dichromate and to measure the rate of the reaction using a spectrometer. The reaction that was used was 6H 3 O + 3CH 3 CH 2 OH(aq) + 2H 2 CrO 4 (aq) -> 3CH 3 CHO(aq)+2Cr 3+ (aq) + 14H 2 O(l). The rate law for this reaction was k 2 K 1 [CH 3 CH 2 OH][H 2 CrO 4 ]. In this experiment the rate of reaction was measured by measuring the absorbance of light of the solution using a spectrometer. Then, by plotting this data the rate constant k was determined by taking the slope of the line since this was a pseudo first order reaction, that is although it was a second order reaction, one of the substances’ change in
Background image of page 1
This is the end of the preview. Sign up to access the rest of the document.

Unformatted text preview: concentration was insignificant compared to the change in the other. The rate constant was found to be .009. The graph confirms that this reaction is pseudo first order because plotting time vs absorbance yielded a straight line. Some possible sources of error in this experiment could have been due to incorrect calibration of the spectrometer which could have given incorrect absorbance values and therefore skew the rate constant and the graph. In conclusion this experiment validated the fact that the reaction was a pseudo first order reaction and found the rate constant of the reaction as well as the rate....
View Full Document

This document was uploaded on 10/16/2010.

Ask a homework question - tutors are online