The reaction that occurs in a breath analyser, a device used to determine the alcohol level in a person's blood stream is 2 K 2 Cr 2 O 7 + 8 H 2 SO 4 + 3 C 2 H 6 O → 2 Cr 2 SO 4 3 + 3 C 2 H 4 O 2

Question

The reaction that occurs in a breath analyser, a device used to determine the alcohol level in a person's blood stream is

$2 K_{2} {Cr}_{2} O_{7} + 8 H_{2} {SO}_{4} + 3 C_{2} H_{6} O \to 2 {Cr}_{2} {({SO}_{4})}_{3} + 3 C_{2} H_{4} O_{2} + 2 K_{2} {SO}_{4} + 11 H_{2} O$

If the rate of appearance of ${Cr}_{2} {({SO}_{4})}_{3}$ is $2.67 mol \min^{- 1}$ at a particular time, the rate of disappearance of $C_{2} H_{6} O$ at the same time is mol $\min^{- 1} .$ (Nearest integer)

TestHub · Accepted Answer

1 3 - d C 2 H 6 O dt = 1 2 d Cr 2 SO 4 3 dt 1 3 (Rate of disappearance of C 2 H 6 O = 1 2 (Rate of disappearance of Cr 2 SO 4 3 Rate of disappearance of C 2 H 6 O = 2 . 67 mol / min × 3 2 = 4 . 005 mol / min

Chemistry - Chemical Kinetics Question with Solution | TestHub

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