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Nitric acid is the most important oxyaci...

Nitric acid is the most important oxyacid formed y nitrogen .It is one of the major industial chemicl and is widely used. Nitric acid is manufactured by the catalytic oxidation of ammonia in what is known as OSTWALD PROCESS which can be represented by the sequenve of reactions shown below:
`4NH_(3)(g) +5O_(2)(g) underset("Catalyst")overset(Pt//Rh)rarr 4NO(g)+6H_(2)O(g) " "...(i)`
`2NO(f) + O_(2)(g) overset(1120 K) rarr 2NO_(2)(g)" "...(ii)`
`3NO_(2)(g)+H_(2)O(l) rarr 2HNO_(3)(aq)+NO(g)" "...(iii)`
The aqueous nitric acid obtained by this method can be concentrated by distillation to ~ 68.5 % by weight . Further concentrated to 98% acid can be achieved by dehyration with concentrated sulphuric acid.
85 kg of `NH_(3)(g)` was heated with 320 kg oxygen in the first step and `NHO_(3)` is prepared according to the above reactions . If the above reactions . If the final solution has volume 500 L ,then molarity of `HNO_(3)` is :
[Assume NO formed finally is not reused]

A

3.33 M

B

8 M

C

2 M

D

6.66 M

Text Solution

Verified by Experts

The correct Answer is:
D
`4 NH_(3)(g)+5O_(2)(g) rarr 4NO+6H_(2)O`
`5xx10^(3)` mole `10^(4)` mole `5xx10^(3)`
`{:(2NO(g)+O_(2)(g) rarr 2NO_(2) (g)),(5xx10^(3)" "5xx10^(3)),(3NO_(2)+H_(2)O(l) rarr 2HNO_(3)(g)+NO(g)),(5xx10^(3)" "2/3xx5xx10^(3)):}`
Molarity `=2/3xx(5xx10^(3))/500=6.66 M`.
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Nitric acid is the most important oxyacid formed y nitrogen .It is one of the major industial chemicl and is widely used. Nitric acid is manufactured by the catalytic oxidation of ammonia in what is known as OSTWALD PROCESS which can be represented by the sequenve of reactions shown below: 4NH_(3)(g) +5O_(2)(g) underset("Catalyst")overset(Pt//Rh)rarr 4NO(g)+6H_(2)O(g) " "...(i) 2NO(f) + O_(2)(g) overset(1120 K) rarr 2NO_(2)(g)" "...(ii) 3NO_(2)(g)+H_(2)O(l) rarr 2HNO_(3)(aq)+NO(g)" "...(iii) The aqueous nitric acid obtained by this method can be concentrated by distillation to ~ 68.5 % by weight . Further concentrated to 98% acid can be achieved by dehyration with concentrated sulphuric acid. If 170 kg of NH_(3) is heated in excess of oxygen then the volume fo H_(2)O(l) produced in 1st reaction at STP si , (rho_(H_(2))O=1 gm//ml))

Nitric acid is the most important oxyacid formed y nitrogen .It is one of the major industial chemicl and is widely used. Nitric acid is manufactured by the catalytic oxidation of ammonia in what is known as OSTWALD PROCESS which can be represented by the sequenve of reactions shown below: 4NH_(3)(g) +5O_(2)(g) underset("Catalyst")overset(Pt//Rh)rarr 4NO(g)+6H_(2)O(g) " "...(i) 2NO(f) + O_(2)(g) overset(1120 K) rarr 2NO_(2)(g)" "...(ii) 3NO_(2)(g)+H_(2)O(l) rarr 2HNO_(3)(aq)+NO(g)" "...(iii) The aqueous nitric acid obtained by this method can be concentrated by distillation to ~ 68.5 % by weight . Further concentrated to 98% acid can be achieved by dehyration with concentrated sulphuric acid. If 180 litre of water completely reacts with NO_(2) produced to form nitric acid according ot the above reactions then the volume of air at STP containing 20% of NH_(3) is :( rho_(H_(2)O)=1 gm//ml )

Following reaction is an example of 4NH_(3)(g)+50_(2)(g)overset(Pt(s)) (rarr) 4NO(g) + 6H_(2) O (g)

Name the type of reaction represented by the following equation : 4NH_(3)(g) +5O_(2)(g) to 4NO(g) + 6H_(2)O(g)

For the given series of reaction, 4NH_(3)(g) + 5O_(2)(g) rarr 4NO(g) + 6H_(2)O(l) 2NO(g) + O_(2)(g) rarr 2NO(g) +O_(2)(g) rarr 2NO_(2)(g) Total volume of O_(2) used if 20 ml NH_(3) is mixed with 100 ml O_(2) is :

In the reaction 4NH_(3)+3O_(2(g)) to 2N_(2(g))+6H_(2)O_((g))