Chemical Thermodynamics of Tin - Volume 12 - OECD Nuclear ...

92 VI Simple tin aqua ions
and accounting for a Sn in a saturated tin amalgam [2003YEN/GRO], Δ (Sn 2+ ,
298.15 K) = − (26.72 ± 0.71) kJ·mol –1 fGm
has been obtained.
Bond and Taylor [1970BON/TAY] report
reaction:
at 25 °C and I = 1.0 M NaClO 4 .
Δ E ο
r
Sn 2+ + 2 Ag(s) + 2 Cl – Sn(s) + 2 AgCl(s)
For Reaction (VI.13):
(VI.12) = − 0.374 V for the
ο
(VI.12)
2 AgCl(s) + H 2 (g) 2 Ag(s) + 2 Cl – + 2 H + (VI.13)
[1967KRA] obtained in the same ionic medium Δ r
E ο (VI.13) = 0.23227 V. With
ε(Sn 2+ , ClO −
4 ) = (0.19 ± 0.04) kg·mol–1 and Eq. (II.38) Δ
ο (Sn 2+ , 298.15 K) =
− (24.15 ± 0.51) kJ·mol –1 fGm
has been obtained.
El Wakkad et al. [1957WAK/SAL] determined the standard potential of
Reaction (VI.10) using a cell of the type:
Pt | H 2 (g) | HClO 4 (x M) | HClO 4 (x M), Sn(ClO 4 ) 2 (y M) | Sn
where y