Question -H3PO4 is a tribasic acid and one of its salt is NaH2PO4. What volume of 1M NaOH solution should be added to 12 g ofNaH2PO4 to convert it intoNa3PO4?
Options:
A .  100 ml
B .  200 ml
C .  80 ml
D .  300 ml
Answer: Option B : B NaH2PO4 basicity = 2 No of moles ofNaH2PO4 =12120 ENaOH=ENaH2PO4 V×1M =12120×1000×2 V =200ml
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