In a first order reaction, The concentration of reactant is reduced to 1/8th of the initial concentration in 75 minutea at 298 K. What is the half per

Question

In a first order reaction, The concentration of reactant is reduced to 1/8th of the initial concentration in 75 minutea at 298 K. What is the half per

In a first order reaction, The concentration of reactant is reduced to 1/8th of the initial concentration in 75 minutea at 298 K. What is the half period of the reaction in minutes?
A. 50 min
B. 15 min
C. 30 min
D. 25 min

Monjur Alahi

5 views

2025-01-04 04:42

1 Answers

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Salim Ahmed Kawsar · Accepted Answer · 2023-02-05T15:29:48+06:00

Salim Ahmed Kawsar

Correct Answer - D
Let a = 1, a - x = 1/8 th, t == 75 min
`k = (2.303)/(t) "log" (a)/(a - x) = (2.303)/(75) "log" (1)/(1//8) = (2.303 xx 0.903)/(75) "min"^(-1)`
for first order reaction,
`t_(1//2) = (0.693)/(k) = (0.693 xx 75)/(2.303 xx 0.903) = 25` min

5 views Answered 2023-02-05 15:29