Question

36
2. Concentrated nitric acid oxidises phosphorus to
phosphoric acid according to the following equation:
P+SHNO, H,PO, SNO, +H.0
If 62 g of phosphorus was used in the reaction.
calculate
(a) Number of moles of phosphorus taken and mass of
phosphoric acid formed
(b) Mass of nitric acid consumed at the same time
(c) The volume of steam produced at the same time if
measured at 760 mm Hg pressure and 273°C.​

Answer 1

Answer:

P+5HNO

3

→H

3

PO

4

+H

2

O+5NO

2

No. of moles of P =

31

9.3

= 0.3 moles.