Answer
See the work section below for details.
Work Step by Step
The main commercial uses of nitric acid are in the production of fertilizers and explosives. Over a million tons of ammonium nitrate fertilizer is produced annually by the reaction between ammonia and nitric acid.
One direct use of phosphoric acid is rust removal. In steel production, thick steel slabs must be heated and rolled into thinner ones. During this process, the hot steel is exposed to air, which oxidizes the surface. To remove this rust, the thin steel sheets pass through phosphoric or hydrochloric acid baths, which dissolve the rust from the metal.
Another major use of phosphoric acid is fertilizer production.
