Federal regulations set an upper limit of 50 parts per
Chapter 4, Problem 115IE(choose chapter or problem)
Problem 115IE
Federal regulations set an upper limit of 50 parts per million (ppm) of NH3 in the air in a work environment [that is, 50 molecules of NH3(g) for every million molecules in the air]. Air from a manufacturing operation was drawn through a solution containing 1.00 × 102 mL of 0.0105 MHCl. The NH3 reacts with HCl according to:
NH3(aq) + HCl(aq)→NH4Cl(aq)
After drawing air through the acid solution for 10.0 min at a rate of 10.0 L/min, the acid was titrated. The remaining acid needed 13.1 mL of 0.0588 M NaOH to reach the equivalence point.
(a) How many grams of NH3 were drawn into the acid solution?
(b) How many ppm of NH3 were in the air? (Air has a density of 1.20 g/L and an average molar mass of 29.0 g/mol under the conditions of the experiment.)
(c) Is this manufacturer in compliance with regulations?
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