Question

A first order reaction has a half life period of 69.3 sec. At 0.10 mol L- reactant concentration, the rate will be -​

Answer 1

ans: 0.01 mol/litre

solution:

for 1st order reaction ,

t1/2=0.6932÷k

k=0.6932÷t1/2

k=0.6932÷63.9= 0.1

Rate of reaction = k ( concentration of reactant )

rate = 0.1×0.1 = 0.01 mol/litre