Under SATP (not STP), magnesium was reacted with acid and 500 ml of hydrogen gas was collected over water. a) what is the vapour pressure of water? b) what is the pressure of the hydrogen gas? c) what amount of hydrogen was produced?
(a) Vapour pressure of water
SATP is defined as 25 °C (298.15 K) and 1 bar.
At 25 °C, the vapor pressure of water is 3.17 kPa = 0.0317 bar,
(b) Partial pressure of hydrogen
Per Dalton's Law of Partial Pressures,
(c) Amount of hydrogen