For a reaction R → P, the concentration of a reactant changes from 0.05 M to 0.04 M in 30 minutes. What will be the average rate of reaction in minutes?

Question

For a reaction R → P, the concentration of a reactant changes from 0.05 M to 0.04 M in 30 minutes. What will be the average rate of reaction in minutes? (A) 4 × 10-4 M min-1 (B) 8 × 10-4 M min- 1 (C) 3.3 × 10-4 M min-1 (D) 2.2 × 10-4 M min-1

Tardigrade Admin · Accepted Answer

Average rate =-(Δ[R]/Δ t)=-(([R]2-[R]1)/t2-t1) =-((0.04-0.05)/30)=(0.01/30) =3.3×10-4 M min-1

Q. For a reaction $R \to P$ , the concentration of a reactant changes from $0.05 M$ to $0.04 M$ in $30$ minutes. What will be the average rate of reaction in minutes?

$4 \times 1 0^{- 4} M mi n^{- 1}$

$8 \times 1 0^{- 4} M mi n^{- 1}$

$3.3 \times 1 0^{- 4} M mi n^{- 1}$

$2.2 \times 1 0^{- 4} M mi n^{- 1}$

Average rate $= - \frac{Δ [ R ]}{Δ t} = - \frac{([ R ] _{2} - [ R ] _{1} )}{t _{2} - t _{1}}$
$= - \frac{( 0.04 - 0.05 )}{30} = \frac{0.01}{30}$
$= 3.3 \times 1 0^{- 4} M mi n^{- 1}$

Q. For a reaction R→P, the concentration of a reactant changes from 0.05M to 0.04M in 30 minutes. What will be the average rate of reaction in minutes?

4×10−4Mmin−1

8×10−4Mmin−1

3.3×10−4Mmin−1

2.2×10−4Mmin−1