1.

a. Complete the table based on the Electrolysis of molten sodium chloride.  Electrodes   Reaction taking place product  Anode  Cathodeb. Write down the reaction taking place in each electrodes and products formed in the electrolysis of sodium chloride solution.  Electrodes   Reaction taking place product  Anode  Cathodec. Why is hydrogen formed in the cathode instead of sodium? d. Write one word for a solution undergoes chemical change when electricity passes through it. e. Write the name of the above process. f. Write down the uses of above type of reaction.

Answer»

a. 

  Electrodes   Reaction taking place product
  AnodeCl → Cl2 + e-
Cl +Cl → Cl2 
 Chlorine Gas
  Cathode Na+ e- → Na Sodium

b. 

  Electrodes   Reaction taking place product
  Anode2Cl→ Cl2 + 2e-Chlorine Gas
  Cathode2H2O + 2e→ H2 + 2OH- Hydrogen Gas

c. When Na+ ion and water are compared reduction occurs to water. Hence H is liberated at cathode.

H+ + e → H, 

H + H → H2

d. Electrolyte. 

e. Electrolysis. 

f. Electroplating, Production of chemicals, Purification of metals.



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