In a first order reaction concentration of reactant decreases from 20 ~m ~mol to 10 ~m ~mol in 1.151 ~min . What is rate constant?

Step-by-step solution

for 1st order reaction aligned & rate constant ( k )= 2.303 a _ o a _ t & a _ o = Initial amount =20 ~m ~mol & at = final amount =10 ~m ~mol & k = 2.303 1.151 20 10 & = 2.303 1.151 2 & = 2.303 .0 .3010 1.151 & k =0.60 ~min ⁻¹ & aligned II ^ nd Method As concentration decreases from 20 ~m ~mol to 10 ~m ~mol in 1.151 ~min _ 1 / 2 =1.151 ~min = n 2 ~K k = 2 1.151 = 0.693 1.151 k =0.60 ~min ⁻¹