How to get pure gold from impure gold..please specify the chemical equation.. any example is fine,e.g. AuCl3 -> Au

Most do this by electrosis. Put the gold compound and impurities into solution (which is challenging), then

Ag+1 + e-1 >> Ag

your answer should look something like this.

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To obtain pure gold from impure gold, a commonly used method is the Miller Process, which involves refining gold through electrolysis. Here is a brief explanation of the process along with the chemical equations involved:

1. Melting: Start by melting the impure gold in a furnace at around 1,200 degrees Celsius. This will liquefy the gold, allowing impurities to rise to the surface.

2. Chlorination: Add chlorine gas (Cl2) to the molten gold. The chlorine reacts with impurities, forming volatile compounds that can be readily separated. One possible reaction is the formation of gold chloride (AuCl3) from impurities:

Au + 3Cl2 → AuCl3

3. Electrolysis: Transfer the chlorinated gold into an electrolytic cell containing a gold anode and a pure gold cathode. The gold anode is the impure gold, while the pure gold cathode acts as the collector. An electrolyte solution, typically a mixture of hydrochloric acid (HCl) and gold chloride (AuCl3), is used. During electrolysis, gold ions (Au3+) are reduced at the cathode, while impurities are left behind at the anode. The reaction occurs as follows:

Au3+ + 3e- → Au

4. Final purification: Once the electrolysis is complete, the gold at the cathode is removed, resulting in pure gold. The electrolyte solution can be reused, while the impurities left at the anode can be discarded.

It is important to note that there are alternative methods of gold purification, such as the Wohlwill Process, aqua regia, or gold purification using acid-activated carbon. These methods involve different chemical reactions and processes.