For the reaction, 
, it is found that tripling the concentration of 
triples the rate, doubling the concentration of 
doubles the rate and doubling the concentration of 
has no effect. What is the rate law?
Text Solution
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: Given, 
The rate law may be represented as,
Rate 
Let 
and 
represent initial concentrations and 
and 
represent final concentrations, and let 
and 
be initial and final rates of the reaction when the concentrations are changed.
(i) If 
If the concentrations of 
and 
remain constant, then
(ii) 
If the concentrations of 
and 
remain constant, then,
(iii) If 
Hence, the rate law is,
Rate 
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