Problemas Bsicos

Unidad 2 BME

1. The most economic method of sewage wastewater treatment is bacteria} digestion. As an intermediate step in the conversion of organic nitrogen to nitrates, it is reported that the Nitrosomonas bacteria cells metabolize ammonium compounds into cell tissue and expel nitrite as a by-product by the following overall reaction:

( )

If 20,000 kg of wastewater containing 5% ammonium ions by weight flows through a septic tank inoculated with the bacteria, how many kilograms of cell tissue are produced, provided that 95% of the (NH4)

+ is consumed?

2. In a process for the manufacture of chlorine by direct oxidation of HCl with air over a catalyst to form CI2 and H2O (only), the exit product is composed of HCl (4.4%), Cl2 (19.8%), H2O (19.8%), 02 (4.0%), and N2 (52.0%). What was: a) The limiting reactant? b) The percent excess reactant? c) The degree of completion of the reaction? d) The extent of reaction?