1.

75% of the first order reaction is completed in 30 minutes. Calculate rate constant of the reaction.

Answer»

Solution :t= 30 min, `[R]_circ = 100,[R]` = 25
`K= 2.303 /t LOG``([R]_circ )/([R] )``K= 2.303 /t log``([R]_circ )/([R] )`
t= `2.303/30 log ``100/25`
K= 0.0767`xx` log 4 = 0.0767 `xx` 0.6021
`k= 0.0461 min^-1`


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