1.

The initial rates ofreaction 3A + 2B + C to Products, at different initial concentrations are given below: The order with respect to the reactants, A, B and Care respectively

Answer»

3, 2, 0
3, 2, 1
2, 2, 0
2, 1, 0

Solution :From `1^(st)` and `2^(nd)` sets of data no CHANGE in RATE is observed with the change in concentration of .C.. So the order with respect to .C. is zero.
From `1^(st)` and `4^(th)` sets of data
Dividing EQ. (4) by eq. (1)
`(1.25 xx 10^(-3))/(5.0 xx 10^(-3))=[(0.005)/(0.010)]^(X)`
or `0.25=(0.5)^(x)` or `(0.5)^(2)=(0.5)^(x)`
`:. x = 2`
The order with respect to .A. is 2 from the `1^(st)` and `3^(rd)` sets of data Dividing eq. (1) by eq. (3)
`(5.0 xx 10^(-3))/(1.0 xx 10^(-2))=[(0.005)/(0.010)]^(y)`
or `(0.5)^(1)=(0.5)^(y)implies y = 1`
The order with respect to .B. is 1
So the order with respective the reactants A, B and C is 2, 1 and 0.


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