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?
GPH210AirQuality SpringSEMESTER2016 Professor:Dr.ElizabethLarson EliteNotetaker:Phoebe(phoebe@studysoup.com) 1. The Killer Smog ○ Donora, Pennsylvania (1948) ■ Deadly air pollution ■ 50 died ■ thousands ill ■ Zincsmelting factory ■ Airborne poison ■ Weather conditions trapped smog ■ Regulation created ■ Air Pollution Act of 1955 ■ Clean Air Act of 1967 2. Air Quality / Air Pollution ○ Air Quality ■ Amount of gases and small particles in the atmosphere that influence ecosystems or human wellbeing ○ Air Pollution ■ High concentration of harmful gases or particles for humans, organisms or structures ○ Gases and Particles ■ 99% of the atmosphere ■ Nitrogen (N2) ■ Oxygen (O2) ■ Argon (Ar) ■ Trace gases (less than 1%) 1 ■ Stable (e.g Helium) ■ Varies (e.g. Carbon Dioxide, Nitrogen Oxides) ■ Volatile Organic Compounds (VOCs) ■ Chemicals that vaporize into air ■ Produced naturally or anthropogenically ■ E.g. Me
