Question

For the reaction R → P, the concentration of a reactant changes from 0.03 M to 0.02 M in 25 minutes. Calculate the average rate of reaction using units of time both in minutes and seconds.​

Answer 1

Given :-

• Initial concentration = 0.03 M.

• Final concentration = 0.02 M.

• Time taken, Δt = 25 min.

To Find :-

• Average rate of the reaction using minutes and seconds as units of time.

Solution :-

$\underline{\:\textsf{ We know that :}}$

Rate = $\rm{-\dfrac{{\Delta}[R]}{{\Delta}t}}$

$\underline{\:\textsf{ Putting the given values :}}$

$\dashrightarrow \rm{\dfrac{-(0.02-0.03)\:mol\:L^{-1}}{25\:min}}$

$\dashrightarrow \rm{\dfrac{0.01\:mol\:L^{-1}}{25\:min}}$

$\dashrightarrow \bold{4\times{}10^{-4}\:mol\:L^{-1}\:min^{-1}.}$

$\dashrightarrow \rm{\dfrac{-(0.02-0.03)\:mol\:L^{-1}}{25\times{}60\:s}}$

$\dashrightarrow \rm{\dfrac{0.01\:mol\:L^{-1}}{25\times{}60\:s}}$

$\dashrightarrow \bold{6.67\times{}10^{-6}\:mol\:L^{-1}\:s^{-1}.}$

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Answer 2

For the reaction R → P, the concentration of a reactant changes from 0.03 M to 0.02 M in 25 minutes. Calculate the average rate of reaction using units of time both in minutes and seconds.