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20ml of 0.1m $H_3BO_3$ solution on complete neutralization requires __________ml of 0.05m $NaOH$ solution

$(a)\; 20ml\qquad(b)\;40ml\qquad(c)\;120ml\qquad(d)\;80ml$

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$H_3BO_3$ is mono basic acid.
Millimoles of $H_3BO_3$=millimoles of NaOH
$20\times 0.1=v\times 0.05$
$v=40ml$
Hence (b) is the correct answer.
answered Oct 28, 2013 by sreemathi.v
 

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