1.

From the following data , show that the decomposition of hydrogen peroxide is a reaction of the first order : {:(t(min),0,10,20),(V(ml),46.1,29.8,19.3):} where t is the time in minutes and V is the volume of standard KMnO_4 solution required for titrating the same volume of the reaction mixture.

Answer»

Solution :Volume of `KMnO_4` , solution used `prop ` AMOUNT of `H_2O_2` present . Hence if the given reaction is of the first ORDER , it must obey the equation.
`k=(2.303)/tlog.(a)/((a-x))`
`k = (2.303)/tlog.V_o/V_t`
In this case, `V_o=46.1` ml
The value of k at each INSTNAT can be calculated as follows :

THUS, the value of k comes out to be nearly constant . Hence it is a reaction of the first order.


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