1.

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

Answer»

`6.66 xx 10^(-5) Ms^(-1)`
`6.6 xx 10^(-6) Ms^(-1)`
`5.67 xx 10^(-5)Ms^(-1)`
`7.26 xx 10^(-6)Ms^(-1)`

Solution :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)`


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