assignment5

assignment5 - Assignment Oxidation of Ethanol by Dichromate...

Info iconThis preview shows pages 1–3. Sign up to view the full content.

View Full Document Right Arrow Icon
Assignment: Oxidation of Ethanol by Dichromate Ion 1 The Oxidation of Ethanol by Dichromate Ion (I) Reaction Kinetics (II) Determination of Blood Alcohol Content MSDS: K 2 Cr 2 O 7 This should be included in the EXPERIMENTAL section. Include the following items, if possible. Hazards: Handling and Storage: Disposal: SAMPLE CALCULATIONS: 1. Based on the integrated rate law for a first order reaction, determine the relationship between the rate constant and slope. 2. Show the Excel expressions for I15 and I439. (Note: If you altered the original spreadsheet, you will need to download another preformatted spreadsheet to see what is I15 and/or I439). 3. If is the volume (mL) of K 2 Cr 2 O 7 used in the titration; , the concentration (M) of K 2 Cr 2 O 7 ; , the volume (mL) of FEDS used to reach the end point in the titration; , the concentration (M) of FEDS; Cr V Cr C FE C FE V Et V , the volume (mL) of the unknown ethanol used in the titration; and Et C , the concentration (M) of ethanol, derive the expression that is used to calculate the concentration (in molarity and %(w/v)) of the unknown ethanol sample. Ans. 3( / 6 ) 2 Cr Cr FE FE Et Et VC C V , %( / ) 10 EtOH EtOH CF W wv × = Part I – Reaction Kinetics PRELABORATORY QUESTIONS: 1a. Use half-reactions to balance the redox equation Cr 2 O 7 (CH 3 ) 2 CHOH (CH 3 ) 2 C=O + = Cr 3+ + Ans. . 1b. What are the oxidizing and reducing agents in this reaction? + 8 + C OH C H 3 C H 3 CO H C H 3 C H 3 H + Cr 2 O 7 = 3 + + 3 Cr 2+ 2 2 7
Background image of page 1

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
Assignment: Oxidation of Ethanol by Dichromate Ion 2 2. The reaction 2 I ( aq ) + S 2 O 8 2 ( aq ) I 2 ( aq ) + 2 SO 4 2 ( aq ) was studied at 25 ° C. The following results were obtained Expt [I ] 0 [S 2 O 8 2 ] 0 Initial Rate (mol/L) (mol/L) (mol/L s) 1 0.080 0.040 12.50 × 10 6 2 0.040 0.040 6.250 × 10 6 3 0.080 0.020 6.250 × 10 6 4 0.032 0.040 5 0.060 0.030 7.03 × 10 6 a. Determine the rate law. b. Calculate a value for the rate constant.
Background image of page 2
Image of page 3
This is the end of the preview. Sign up to access the rest of the document.

This note was uploaded on 10/28/2010 for the course CHEM 100A taught by Professor Dai during the Winter '06 term at UCSD.

Page1 / 6

assignment5 - Assignment Oxidation of Ethanol by Dichromate...

This preview shows document pages 1 - 3. Sign up to view the full document.

View Full Document Right Arrow Icon
Ask a homework question - tutors are online