The half-life for a zero order reaction having 0.02 M initial concentration of reactant is 100 s. The rate constant (in mol L-1 s-1) for the reaction is

Question

The half-life for a zero order reaction having 0.02 M initial concentration of reactant is 100 s. The rate constant (in mol L-1 s-1) for the reaction is (A) 1.0 × 10-4 (B) 2.0 × 10-4 (C) 2.0 × 10-3 (D) 1.0× 10-2

Tardigrade Admin · Accepted Answer

(t1/2) textzero=([A]0/2K) 100S=(0.02M/2K) K=(0.02M/2 × 100) =1 × 10-4mol L-1 s-1

Q. The half-life for a zero order reaction having $0.02 M$ initial concentration of reactant is $100 s$ . The rate constant (in $m o l L^{- 1} s^{- 1})$ for the reaction is

$1.0 \times 1 0^{- 4}$

$2.0 \times 1 0^{- 4}$

$2.0 \times 1 0^{- 3}$

$1.0 \times 1 0^{- 2}$

$(t_{1/2})_{zero} = \frac{[ A ] _{0}}{2 K}$
$100 S = \frac{0.02 M}{2 K}$
$K = \frac{0.02 M}{2 \times 100}$
$= 1 \times 1 0^{- 4} m o l L^{- 1} s^{- 1}$

Q. The half-life for a zero order reaction having 0.02M initial concentration of reactant is 100s. The rate constant (in molL−1s−1) for the reaction is

1.0×10−4

2.0×10−4

2.0×10−3

1.0×10−2