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Electrolysis — Chemistry STD 10 — Question

ICSE BoardEnglish MediumSTD 10ChemistryElectrolysis5 Marks
Question
(a) Copy and complete the following table which refers to two practical applications of electrolysis
  Anode Electrolyte Cathode
Silver plating of a spoon   A solution of potassium argentocyanide  
Purification of copper      
(iii) Extraction of sodium      
(b) Write the equation taking place at the anode for Q. 2(a).
✓

Answer

(a)
  Anode Electrolyte Cathode
Silver plating of a spoon The plate of pure clean The solution of potassium argentocyanide Article to be electroplated
Purification of copper Impure copper The solution of copper sulphate and dilute sulphuric acid The thin strip of pure copper
(iii) Extraction of sodium Nickel Fused sodium chloride Iron
(b)
  1. $Ag - e^- → Ag^+$
  2. $Cu - e^-→ Cu^{2+}$
  3. $Cl^- - e^- → Cl$
  4. $Cl + Cl → Cl_2$

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