# Kinetics of the Depolymerization of Diacetone Alcohol Essay

4188 Words
Mar 15th, 2011
17 Pages

Experiment N | Kinetics of the Depolymerization of Diacetone Alcohol via Basic Catalysis | | Ingrid Tafur -5672578 | 2/11/2011 |

CHM233O

Partner: Laura Marrongelli

Demonstrator: Cheryl McDowall

Objective

The rate constant of the depolymerization of diacetone alcohol via basic catalysis was determined by monitoring the change in volume as a function of time at constant temperature of a pseudo first order reaction where the species in excess was sodium hydroxide. This was accomplished by using a dilatometer as the apparatus and following both methods: isolation and initial rates in conjunction.

Introduction

Depolymerization is the process in which a compound is converted into one of a smaller molecular weight and of

CHM233O

Partner: Laura Marrongelli

Demonstrator: Cheryl McDowall

Objective

The rate constant of the depolymerization of diacetone alcohol via basic catalysis was determined by monitoring the change in volume as a function of time at constant temperature of a pseudo first order reaction where the species in excess was sodium hydroxide. This was accomplished by using a dilatometer as the apparatus and following both methods: isolation and initial rates in conjunction.

Introduction

Depolymerization is the process in which a compound is converted into one of a smaller molecular weight and of

*…show more content…*
The Standard Deviation 'σ' is defined as the positive square root of the variance'σ2'. Standard deviation is a measure of the dispersion of a set of data from its average; the more spread the data the higher the deviation. The standard deviation of the preparation of the 0.2M NaOH solution can be calculated using, σ=1Ni=1N(ci-μ)2 (8)

Where N is the total number of entries, ci in this case is the concentration of NaOH for each trial, and μ is the average of the trials.

In order to calculate the percent error of the experiment, the formula is

Percent error=experimental value-literature valueliterature value ×100% (9)

Reagent: diacetone alcohol

Diacetone alcohol is a colourless liquid with faint with a pleasant odour. It is flammable and miscible with water, alcohol, ether, and other solvents. It is mostly produced to be used as a coatings solvent. Also used for solvent for cellulose acetate, nitrocellulose, celluloid, fats, oils, waxes, and resins. It is used as a preservative in pharmaceutical preparations and in some antifreeze solutions and in hydraulic fluids.

Experimental Procedure A. Procedure development (Week 1)

Following the derivations and their proper assumptions up to equation 5, a directly proportional relationship was seen

Where N is the total number of entries, ci in this case is the concentration of NaOH for each trial, and μ is the average of the trials.

In order to calculate the percent error of the experiment, the formula is

Percent error=experimental value-literature valueliterature value ×100% (9)

Reagent: diacetone alcohol

Diacetone alcohol is a colourless liquid with faint with a pleasant odour. It is flammable and miscible with water, alcohol, ether, and other solvents. It is mostly produced to be used as a coatings solvent. Also used for solvent for cellulose acetate, nitrocellulose, celluloid, fats, oils, waxes, and resins. It is used as a preservative in pharmaceutical preparations and in some antifreeze solutions and in hydraulic fluids.

Experimental Procedure A. Procedure development (Week 1)

Following the derivations and their proper assumptions up to equation 5, a directly proportional relationship was seen