A gold miner wishes to reduce the suspended solids in his tailwater pit before releasing the water into a nearby stream. Which would be a better flocculating agent, Na2CO3 or Fe2O3? Why?

For the process of gold mining, Na₂CO₃ is better than Fe₂O₃

Explanation:

The task of a gold miner, is to extract gold.

For the process of Gold mining, carbon filters are preferred, because by using carbon filters gold can be easily extracted.

In general, silver and gold get adsorbed on the surface of carbon, hence can be very conveniently extracted from the solution.