Electrochemistry - Result Question 82

####30. If the cathode is a Hg electrode, the maximum weight (in gram) of amalgam formed from this solution is

(a) 200

(b) 225

(c) 400

(d) 446

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Solution:

  1. At cathode Na++eHgNa(Hg) Amalgam 

Two moles of Na formed during electrolysis would produce two moles of Na(Hg) amalgam.

mass of amalgam =2×(23+200)=446g



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