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Question
During electrolysis of molten sodium chloride, the time required to produce 0.1 mole of chlorine gas using a current of 3A is ___________.
Options
55 minutes
107.2 minutes
220 minutes
330 minutes
Solution
During electrolysis of molten sodium chloride, the time required to produce 0.1 mole of chlorine gas using a current of 3A is 107.2 minutes.
Explanation:
m = ZIt ...(mass of 1 mole of Cl gas = 71)
t = `"m"/"ZI"` ....(∴ mass of 0.1 mole of Cl2 gas = 7.1 g mol−1)
= `(7.1)/(71/(2 xx 96500) xx 3)` \[\ce{(2Cl^- -> Cl2 + 2e^-)}\]
= `(2 xx 96500 xx 7.1)/(71 xx 3)`
= 6433.33 sec
= 107.2 min
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