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Nitric acid can be produced from NH(3) i...

Nitric acid can be produced from `NH_(3)` in three step process
I) `4NH_(3(g))+5O_(2(g))rarr4NO_((g))+6H_(2)O_((g))` II) `2NO_((g))+O_(2(g))rarr2NO_(2(g))`
III) `3NO_(2(g))+H_(2)O_((l))rarr2HNO_(3(aq))+NO_((g))`
% yield of I, II, III reaction are respectively 50%, 60% and 80%. Then how much volume of `NH_(3(g))` at STP is required to produce 2.25 gm of `HNO_(3)`.

Text Solution

Verified by Experts

The correct Answer is:
5
`4NH_(3)+5O_(2)rarr4NO+6H_(2)O,50%`
`100rarr50`
`2NO+O_(2)rarr2NO_(2),60%`
`50 rarr50xx(60)/(100)=30`
`3NO_(2)+H_(2)Orarr2HNO_(3)+NO,80%`
`30rarr20xx(80)/(100)=16`
100 moles `NH_(3)=16` moles `HNO_(3)`
`?larr (2.25)/(63)` moles
`V_(NH_(3))` at STP = `(2.25xx100)/(63xx16)xx22.4=5`
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