Kinetics - Bromation of Acetone PDF

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Kinetics Bromation of Acetone

Name: Shaili Batsri Date: 09/13/2021 Lab Partners:

Introduction:

Chemical Kinetics is the study of rates of chemical reactions and the mechanisms by which they occur. By looking at a rate of a reaction, one can observe how quickly reactants are used up and products are formed. The rate of a chemical reaction may be defined as either the rate of disappearance of the reactants or as the rate of appearance of the products. Among the factors that affect reaction rate are the physical state of the reactants, reactants concentration, reaction temperature, and the presence of a catalyst. A catalyst is a substance that can be added to a reaction to increasing the reaction rate without being directly involved in the reaction. To determine the order of each reactant in a chemical reaction, one needs to vary one reactant concentration while holding the others constant. In this lab, we will determine the reaction order for bromine, acetone, and H + by observing the disappearance of Br2 in the reaction.

Procedure: 1. Set up a spectrophotometer at 400 nm in accordance with the demonstration. 2. Start the reaction by adding 1 mL bromine, stir, and begin to plot a graph of A vs. time. 3. Record absorbance every few seconds until the reaction slows. *Repeat the steps but vary the concentration of bromine and the volumes of water, acetone and HCl

Date Sheet: Determination Of Kf Of T-Butanol 1. Complete the following table. Plot Number

mL H2O

mL Acetone

mL HCl (aq)

mL Br2 (aq)

Rate

2. What is the order of the reaction with respect to Acetone ____ , HCl ____ , and Br2 ____ ? 3. What is the average value of the rate constant, K? show calculations from at least five trials: 4. Write the rate law for the reaction. 5. Turn in all plots. Make sure to label them with the number of the trial on the table above.

Conclusion:...