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V-9
(4.0)
15.
(Exp S) The rate of reaction for:
2 I
-
(aq)
+ S2O
8
2-
(aq)
2SO
4
2-
(aq)
+ I
2(aq)
was studied and the following experimental data obtained.
Run
[S2O
8
2-
]
[I
-
]
[I2]/
t
mol L
-1
mol L
-1
mol L
-1
s
-1
1
0.080
0.060
1.4 x 10
-5
2
0.040
0.060
7.2 x 10
-6
3
0.027
0.060
5.3 x 10
-6
4
0.080
0.030
7.2 x 10
-6
i)
Calculate the reaction order with respect to S2O
8
2-
.
ii)
Calculate the reaction order with respect to I
-
.
iii)
Write the rate law expression for this reaction.
iv)
Calculate the rate constant for this reaction.
