[Big-Daddy]

Calculate equilibrium concentrations in a 0.2 dm³ aqueous solution (25°C) of alcohol (pK_a = 16), 0.6 moldm^-3 initial concentration, to which 3g sodium metal is added? E°(Na⁺/Na) = -2.71 V.

I know the reactions are:

2H⁺ + 2Na (s) H₂ (g) + 2Na⁺
R-OH (aq)  R-O^- (aq) + H⁺
H2O  H⁺ + OH^-

The equilibrium constants for these reactions are given. My issues are, how to deal with production of H₂ (g) - clearly we need to calculate partial pressure somehow - and with Na (s). Seems hard to write a mass balance including either of these.