Question

5. Hydrogen gas is collected over water at 27°C and 762 7mmHg pressure. If the volume of the gas collected is 0.912 L. calculate the volume of dry gas at STP. (At 27°C the vapour pressure is 26.7mmHg) - ​

Answer 1

Answer:

Correct option is

C

0.96 atm

Using the Dalton's law

P (Total) = Poxygen +Pwater

The vapor pressure of water is 21mmHg

751mmHg = Poxygen + 21 mmHg

Poxygen = 751 mmHg - 21 mmHg

Poxygen =730 mmHg

Convert the partial pressure of oxygen in to atmosphere

(730 mmHg) (1 atm / 760 mmHg) = 0.96 atm