A chemical “brearhalyzer” test works because ethyl alco¬hol in the breath is oxidized by the dichromate ion (orange) to form acetic acid and chromium(III) ion (green). The balanced reaction is
You analyze a breathalyzer test in which 4.2 mg of K2Cr2O7 was reduced. Assuming the volume of the breath was 0.500 L at 30.°C and 750. mm Hg, what was the mole percent alcohol of the breath?
Answer to relevant QuestionsAlcohols are very useful starting materials for the pro-duction of many different compounds. The following conversions, starting with 1-butanol, can be carried out in two or more steps. Show the steps (reactants/catalysts) ...Consider the titration of 50.0 mL of 1.0 M glycine hy-drochloride [(H3NCH2COOH)CI], with 1.0 M NaOH. For +H3NCH2COOH, Ka for the carboxylic acid group is 4.3 X 10-3 and Kb, for the amino group is 6.0 X 10-5. a. Calculate the ...There is only one value of the equilibrium constant for a particular system at a particular temperature, but there are an infinite number of equilibrium positions. Explain. For the reaction H2(g) + Br2(g) ⇌ 2HBr(g) Kp = 3.5 × 104 at 1495 K. What is the value of Kp for the following reactions at 1495 K? a. HBr(g) ⇌ 1/2 H2(g) + 1/2 Br2(g) b. 2HBr(g) ⇌ H2(g) + Br2(g) c. 1/2H2(g) + 1/2 ...At a particular temperature, 12.0 moles of SO3 is placed into a 3.0- L rigid container, and the SO3 dissociates by the reaction 2SO3(g) ⇌ 2SO2(g) + O2(g) At equilibrium, 3.0 moles of SO2 is present. Calculate K for this ...
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