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At STP, 2.8L of oxygen is produced at th...

At STP, 2.8L of oxygen is produced at the anode, during electrolysis of aqueous NaOH solution. Find the volume of the other gas produced at the cathode?

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`2OH^(-)rarr(1)/(2)O_(2)+H_(2)O+2e" 11.2 L "O_(2)(STP)-=2F.`
`therefore" "2.8LO_(2)" (at STP)"-=0.5F.`
`2H^(+)+2erarrH_(2)" 2F "-=22.4L H_(2)(STP)`
`therefore 0.5F-=5.6L H_(2)(STP)`
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