1.

A first order reaction has a rate constant , 1.15xx10^(-3)s^(-1). How long will 5 g of this reactant take to reduce to 3 g ?

Answer»

SOLUTION :Here , `[R]_0 = 5 G , [R]3 g`
`k = 1.15 xx10^(-3)s^(-1)`. As the reaction is of first order,
`k = (2.303)/(t)log.([R]_0)/([R])`
`t = (2.303)/(overset(..)uoverset(..)uoverset(..)uxx-3-1)log.(5g)/(3g)=2.00xx10^3(log1.667)s `
`2.0xx10^3xx0.2219s = 443.85=444s`


Discussion

No Comment Found

Related InterviewSolutions