6 I- + BrO3- + 6 H+ ----- 3 I2 + Br- + 3 H2O Rate= k[I-]m[BrO3-]n[H+]p rate= (∆[I2])/(3*∆time) [I-] 0.010M [S2O3-2] 0.0010M H2O [BrO3-] 0.04M HCl 0.10M Starch Indicator (sec.) Volume, ml Volume, ml Volume, ml Volume, ml Volume, ml 1 10 10 20 10 10 1-3 drops 301.90 2 20 10 10 10 10 1-3 drops 213.28 3 10 10 10 20 10 1-3 drops 214.92 4 10 10 10 10 20 1-3 drops 86.45 Temperature of Reaction: _______20 C________ 1. Using the dilution equation (M1V1 = M2V2) calculate the concentration of the I-, BrO3- and the H+ (HCl) in the final mixture just prior to any reaction. 2. Calculate the rate for each experiment as explained in the background information. 3. Using the information above determine the rate law (m, n and p) for the reaction. Show all calculations/reasoning in your notebook. m_____________ n_________________ p ____________ Rate= k[I-]m[BrO3-]n[H+]p Calculate the rate constant for each experiment and then the average. k______________ k________________ k________________ k ____________ Average value of k __________________ (include units) Rewrite rate law including values for m, n, p and the average value of k:
6 I- + BrO3- + 6 H+ ----- 3 I2 + Br- + 3 H2O
Rate= k[I-]m[BrO3-]n[H+]p
rate= (∆[I2])/(3*∆time)
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[I-] 0.010M |
[S2O3-2] 0.0010M |
H2O |
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[BrO3-] 0.04M |
HCl 0.10M |
Starch Indicator |
(sec.) |
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Volume, ml |
Volume, ml |
Volume, ml |
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Volume, ml |
Volume, ml |
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1 |
10 |
10 |
20 |
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10 |
10 |
1-3 drops |
301.90 |
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2 |
20 |
10 |
10 |
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10 |
10 |
1-3 drops |
213.28 |
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3 |
10 |
10 |
10 |
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20 |
10 |
1-3 drops |
214.92 |
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4 |
10 |
10 |
10 |
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10 |
20 |
1-3 drops |
86.45 |
Temperature of Reaction: _______20 C________
1. Using the dilution equation (M1V1 = M2V2) calculate the concentration of the I-, BrO3- and the H+ (HCl) in the final mixture just prior to any reaction.
2. Calculate the rate for each experiment as explained in the background information.
3. Using the information above determine the rate law (m, n and p) for the reaction. Show all calculations/reasoning in your notebook.
m_____________ n_________________ p ____________
Rate= k[I-]m[BrO3-]n[H+]p
Calculate the rate constant for each experiment and then the average.
k______________ k________________ k________________ k ____________
Average value of k __________________ (include units)
Rewrite rate law including values for m, n, p and the average value of k:
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