# Applications of Electrolysis

Applications of Electrolysis are as follows:

(a) In the determination of equivalent mass.

(b) In electroplating: Here an inferior metal is coated with a superior metal to make it corrosion proof and attractive.

(c) In electrotyping.

(d) In electro refining of the metals like Cu, Ag, Au etc.

(e) In electrometallurgy.

E.g. Na from $(NaCl + CaCl_2 KF)$ .

Al from $(Al_2O_3 Na_3AlF_3)$ .

Mg from $(MgCl_2 + NaCl + CaCl_2)$ .

(f) In the manufacture of certain compounds such as

$NaOH, KOH, Na_2CO_3, KClO_3$ etc.

Current efficiency:

$\% \text{Current efficiency} = \dfrac{\text{Actual current}}{\text{Ammeter current}} \times 100$

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