Iodine Propanone Reaction

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TITLE OF EXPERIMENT: An investigation of the iodine/propanone reaction.

DATA COLLECTION AND PROCESSING :

Chemical Equation:

CH3COCH3 (aq) + I2 (aq) ( CH3COCH2I + H+ (aq) + I- (aq)

Rate of reaction:

R = V
T

Concentration of reactant after dilution :

Volume of reactant x concentration of reactant
Total volume of mixture

Uncertainty for rate of reaction:

R =( V + t ) x R
V t

Eg for Exp 1, run 1:
R = ( 1 + 0.1 + 0.1 + 0.1 + 0.01 ) x 0.36= +0.03cm3s-1 20 8 0 4 11.16

Experiment 1 (without starch solution) :
| |Run 1 |Run 2 |Run 3 |Run 4 | |Volume of 2M HCl/cm3 (+1cm3) |20 |10 |20 |20 | |Volume of 2M propanon/cm3 (+0.1cm3) |8 |8 |4 |8 | |Volume of water/cm3 (+0.1cm3) |0 |10 |4 |2 | |Volume of 0.01M iodine/cm3 (+0.1cm3) |4 |4 |4 |2 | |Time for colour to disappear/s (+0.01s) |11.16 |26.63 |27.53 |6.45 | |Rate(Vol. Of I2(aq)/Time)/cm3s-1 |0.36 (+0.03) |0.15 (+0.02) |0.15 (+0.02) |0.31 (+0.05) |

Table 5 shows the rate of reaction for each run without the presence of starch.

Experiment 2 (with starch solution):

| |Run 1 |Run 2 |Run 3 |Run 4 | |Volume of 2M HCl/cm3 (+1cm3) |20 |10 |20 |20 | |Volume of 2M propanone/cm3 (+0.1cm3) |8 |8 |4 |8 | |Volume of water/cm3 (+0.1cm3) |0 |10 |4 |2 | |Volume of 0.01M iodine/cm3 (+0.1cm3) |4 |4 |4 |2 | |Volume of starch solution/cm3 (+0.1cm3) |5 |5 |5 |5 | |Time for colour to disappear/s (+0.01s) |37.44 |50.53 |55.19 |14.56 | |Rate(Vol. Of I2(aq)/Time) /cm3s-1 |0.11 (+0.01) |0.08 (+0.01) |0.07 (+0.01) |0.14 (+0.03) |

Table 6 shows the rate of reaction for each run with the presence of starch.

Experiment 1 (without starch solution) :

| |Run 1 |Run 2 |Run 3 |Run 4 | |Concentration of HCl/moldm-3 |1.25 |0.625 |1.25 |1.25 | |Concentration of propanone/moldm-3 |0.5 |0.5 |0.25 |0.5 | |Concentration of Iodine/moldm-3 |0.00125 |0.00125 |0.00125 |0.000625 |

Table 7 shows the concentration of reactant for experiment 1.

Experiment 2 (with starch solution) :

| |Run 1 |Run...
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