The rate constant of a first order reaction is 3 × 10-6 per sec. If the initial concentration is 0.10 M, the initial rate of reaction is

Question

The rate constant of a first order reaction is 3 × 10-6 per sec. If the initial concentration is 0.10 M, the initial rate of reaction is (A) 3 × 10-6 Ms -1 (B) 3 × 10-5 Ms -1 (C) 3 × 10-8 Ms -1 (D) 3 × 10-7 Ms -1

Tardigrade Admin · Accepted Answer

For first order reaction, rate = rate constant × concentration of reactant ∴ Initial rate = rate constant × Initial concentration =3 × 10-6 × 0.10=3 × 10-7 M s-1

Q. The rate constant of a first order reaction is $3 \times 1 0^{- 6}$ per sec. If the initial concentration is $0.10$ $M$ , the initial rate of reaction is

$3 \times 1 0^{- 6} M s^{- 1}$

$3 \times 1 0^{- 5} M s^{- 1}$

$3 \times 1 0^{- 8} M s^{- 1}$

$3 \times 1 0^{- 7} M s^{- 1}$

For first order reaction,

rate $=$ rate constant $\times$ concentration of reactant

$∴$ Initial rate $=$ rate constant $\times$ Initial concentration

$= 3 \times 1 0^{- 6} \times 0.10 = 3 \times 1 0^{- 7} M s^{- 1}$

Q. The rate constant of a first order reaction is 3×10−6 per sec. If the initial concentration is 0.10 M, the initial rate of reaction is

3×10−6Ms−1

3×10−5Ms−1

3×10−8Ms−1

3×10−7Ms−1