The most effective method of decontamination of polluted industrial wastewater is its treatment with substances that transform harmful impurities into insoluble compounds. At the same time, the precipitating reagent can be in excess or in short supply. The enterprise supplies wastewater containing 3.31 kg of lead (II) nitrate to the water treatment site. Precipitation of lead cations is carried out by adding 1.27 kg of sodium carbonate to the solution.
Determine which reagent and in what quantity is taken in excess. Calculate the mass of the PbCO3 precipitate formed.