In the froth flotation process for concentrating sulfide ore, finely divided CuFeS2 is suspended in water with pine oil, and air is introduced to create a froth that allows the ore to float while the gangue sinks. The discussion raises a question about the role of dilute acid, specifically nitric acid, in breaking down the froth containing sulfide ore. It emphasizes that, based on existing knowledge and referenced sources, the addition of acid is not a standard practice in this process. The focus remains on the effectiveness of the froth flotation method without the involvement of acids, highlighting the importance of understanding the chemical interactions and reactions occurring during the concentration of sulfide ores.