Question

00
During the electrolysis of brine, 710 g of Cl, was liberated at anode. The weight of NaOH
formed
(1) 800 g
(2) 400 g
(3) 80 g
(4) 40 g​

Answer 1

Explanation:

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Answer 2

The weight of NaOH produced at the cathode is equal to 800 g.

• Brine is the common name for NaCl.
• In the electrolysis of brine chlorine gas is liberated at the anode and sodium hydroxide is produced at cathode.
• Each mole of NaCl contains one mole each of sodium and chloride ions, so for every one chlorine atom oxidized, one sodium ion gets converted into one molecule of sodium hydroxide.
• So, for 710 g of chlorine (that is 20 moles of chlorine atoms), 20 moles of NaOH isproduced.
• Hence, mass of NaOH produced is equal to 800 g.