How many liters of hydrogen gas can be produced at 313.4 K and 105.3 kPa if 23.4 g of sodium metal is completely reacted with water according to the following equation? 2Na(s) + 2H₂O(l) → 2NaOH(aq) + H₂(g)

1 Answer
anor277
Jul 7, 2018

Well, #V=(nRT)/P# and so we plug in the numbers..and approx. #12*L#...

Explanation:

We examine the reation…

#Na(s) + H_2O(l) rarr NaOH(aq) + 1/2H_2#

#n_"sodium"=(23.4*g)/(22.99*g*mol^-1)=1.018*mol#...and so HALF an EQUIV dihydrogen gas is evolved ... and we have to find the appropriate gas constant...

#(1/2xx1.018*molxx8.314*L*kPa*K^-1*mol^-1xx313.4*K)/(105.3*kPa)# #-=??*L#

Note that given the experiment, the PRESSURE that you measure is due to....

#P_"measured"=P_"dihydrogen"+P_"Saturated vapour pressure"#.

#P_"SVP"# would be extracted from a Table....and subtracted from the pressure reading to give #P_"dihydrogen"#...

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