the initial concentration of reactant in a first-order reaction is 0.27 m and has a rate constant of 0.75 s-1. what is the concentration (mol/l) of reactant after 0.75 s?

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09-12-2022
Chemistry

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the initial concentration of reactant in a first-order reaction is 0.27 m and has a rate constant of 0.75 s-1. what is the concentration (mol/l) of reactant after 0.75 s?

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rathipushpendra345 rathipushpendra345 · Answer 1 · 2022-12-16T00:20:29-05:00

After 0.75 s, the reactant's final concentration was 0.0672 mol/L.

Log [Initial concentration] = - rate constant time + log [Initial concentration] has been supplied as the rate reaction for the first-order reaction. [Last-ditch effort]

The reaction described has:

0.27 M for the first concentration

0.75 s/rate constant

Time = 0.75 s

One can provide the ultimate concentration by:

log [0.27] = - 0.75 *0.75 + log [Final concentration]

log [0.27]=-0.5625+log [Final concentration]

log [0.27] + 0.5625 = log [Final concentration]

log [Final Concentration]=1.31+0.5625

log [Final concentration] = 1.8725

Final concentration: 0.0672 mol/L

After 0.75s, the reactant's final concentration was 0.0672 mol/L.

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