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100 ml 0.1 M H_3PO_4 solution is being titrated with 0.1 M NaOHsolution. The pH of the reaction mixture keeps increasing with addition of NaOH. The successive dissociation constant of H_3PO_4 " are "10^(-3) , 10 ^(-6) and 10^(-14)respectively. How much volume of the given NaOH must be added such that a buffer H_2PO_4^(-) // HPO_4^(-2)of maximum capacity is formed.

Answer» <html><body><p>100 ml <br/>150 ml <br/>200 ml <br/>250 ml </p>Solution :` {:(H_3PO_4 +, <a href="https://interviewquestions.tuteehub.com/tag/naoh-572531" style="font-weight:bold;" target="_blank" title="Click to know more about NAOH">NAOH</a> to, NaH_2PO_4, +H_2O ),(<a href="https://interviewquestions.tuteehub.com/tag/10-261113" style="font-weight:bold;" target="_blank" title="Click to know more about 10">10</a> m " moles " , 10 m " moles " ,0,),(-,-, ,10 m " moles " ):}` <br/> ` {:(NaH_2PO_4 +, NaOH to , Na_2HPO_4+ H_2O ),(10 m " moles " , 5 m " moles " ,"-" ),( 5 m " moles " , , ):}` <br/>To get <a href="https://interviewquestions.tuteehub.com/tag/buffer-905159" style="font-weight:bold;" target="_blank" title="Click to know more about BUFFER">BUFFER</a> with maximum buffer capacity <a href="https://interviewquestions.tuteehub.com/tag/half-1014510" style="font-weight:bold;" target="_blank" title="Click to know more about HALF">HALF</a> of the `NaH_2PO_4` should be consumed. <br/> In 1st <a href="https://interviewquestions.tuteehub.com/tag/step-25533" style="font-weight:bold;" target="_blank" title="Click to know more about STEP">STEP</a>, To get 10 m moles NaOH, volume should be 100 ml. <br/>In 2nd, step , To get 5 m moles NaOH , volume should be 50 ml <br/> Total vol = 150 ml</body></html>


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