Question

The concentration of a reactant changes form `0.03 M` to `0.02 M` in `25 min`. Calculate the average rate of reaction uisng of time both in minutes and seconds.
A. `6.66 xx 10^(-5) Ms^(-1)`
B. `6.6 xx 10^(-6) Ms^(-1)`
C. `5.67 xx 10^(-5)Ms^(-1)`
D. `7.26 xx 10^(-6)Ms^(-1)`

Answer 1

Correct Answer - B
For this reaction `R rarr P`,
Average rate of reaction
`("Change in concentration of reactant or product")/("Time taken")`
`=(-Delta[R])/(t)=-([R_(2)]-[R_(1)])/(t)=-((0.02-0.03)M)/((25xx60)s)`
`=6.6 xx 10^(-6)Ms^(-1)`