The reaction that occurs in a Breathalyzer,a device used to determine the alcohol level in a person's bloodstream,is given below.If the rate of appearance of Cr₂(SO₄)₃ is 1.64 mol/min at a particular moment,what is the rate of disappearance of C₂H₆O at that moment?

Question

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The balanced chemical equation for the reaction in a Breathalyzer is: 6 C₂H₆O + 2 Cr2O2-7 + 24 H+ → 12 Cr₂(SO₄)₃ + 18 H2O From the equation, it can be seen that for every 6 moles of C₂H₆O consumed, 12 moles of Cr₂(SO₄)₃ are formed. Therefore, the rate of disappearance of C₂H₆O can be calculated as: (rate of appearance of Cr₂(SO₄)₃) / 2 = 1.64 mol/min / 2 = 0.82 mol/min Therefore, the best choice is C, 2.46 mol/min, which is not an option in the given choices.

The Reaction That Occurs in a Breathalyzer,a Device Used to Determine