The electrolytic refining of Lead (Bett's process) is similar in principle to the refining of Copper — Metallurgy and Isolation of Elements Chemistry Question

💡 Solution & Explanation

In the electrolytic refining of crude lead (often following desilverization), the specific electrolyte used is a mixture of lead silicofluoride ($PbSiF_6$) and hydrofluosilicic acid ($H_2SiF_6$). A small amount of gelatin is often added to adjust the viscosity and ensure a smooth, coherent deposit of pure lead on the cathode.