For a first order reaction, A longrightarrow B, the reaction rate at reactant concentration of 0.01 M is found to be 2.0 × 10-5 mol L-1 s-1. The half-life period of the reaction is

Question

For a first order reaction, A longrightarrow B, the reaction rate at reactant concentration of 0.01 M is found to be 2.0 × 10-5 mol L-1 s-1. The half-life period of the reaction is (A) 220 s (B) 30 s (C) 300 s (D) 347 s

Tardigrade Admin · Accepted Answer

For first order reaction, A longrightarrow B rate = k x [A] Rate =2.0 × 10-5 mol L-1 s-1 [A]=0.01 M So, 2.0 × 10-5=k × 0.01 k=(2.0 × 10-5/0.01) s-1 =2.0 × 10-3 s-1 For first order reaction, t1/2=(0.693/k) =(0.693/2.0 × 10-3) =346.5 ≈ 347 s

Q. For a first order reaction, A⟶B, the reaction rate at reactant concentration of 0.01M is found to be 2.0×10−5molL−1s−1. The half-life period of the reaction is

220 s

30 s

300 s

347 s

For first order reaction, A⟶B rate = k x [A] Rate=2.0×10−5molL−1s−1 [A]=0.01 M So, 2.0×10−5=k×0.01 k=0.012.0×10−5​s−1 =2.0×10−3s−1 For first order reaction, t1/2​=k0.693​ =2.0×10−30.693​ =346.5≈347 s

Q. For a first order reaction, $A ⟶ B$ , the reaction rate at reactant concentration of $0.01 M$ is found to be $2.0 \times 1 0^{- 5} m o l L^{- 1} s^{- 1}$ . The half-life period of the reaction is