To neutralise completely 20 mL ofO. I M aqueous solution of phosphorou – InterviewSolution

1.	To neutralise completely 20 mL ofO. I M aqueous solution of phosphorous acid (H_(3)PO_(3)), the value of 0.1 M aqueous KOH solution required is
Answer» 40 ML 20 mL 10 mL 60 mL Solution :`N _(1) V_(1) =N_(2) V_(2) (H_(3) PO_(3)` is DIBASIC ` therefore M =2N `) `20xx0.2 =0.1 xxV` `therefore V = 40 ml`

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