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  • At least how many ti half lives should elapse for a first order reaction A products so that the reaction is at least <img alt="86 \%" src="https://entrancecorner.oncodecogs.com/gif.latex?86%20%5C%2

At least how many ti half lives should elapse for a first order reaction A products so that the reaction is at least 86 \% completed

Option: 1

9


Option: 2

6


Option: 3

3


Option: 4

8


Answers (1)

best_answer

\mathrm{100 \stackrel{t_{1 / 2}}{\longrightarrow} 50 \stackrel{t_{1 / 2}}{\longrightarrow} 25 \stackrel{t_{1 / 2}}{\longrightarrow} 12.5}

0 \% \, \, \quad 50 \% \, \, \quad 75 \%\, \, \quad 87.5 \%

\mathrm{\therefore}  At least 3 half -lives should elapse for the reaction completion of at least 86 %

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vishal kumar

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