Choose the correct expression for Keq and description (homogeneous or heterogeneous) for the following reaction:
Cr3+(aq) + 3 Ag(s) Cr(s) + 3 Ag+(aq)
a) Keq = [Ag+]3 / [Cr3+] ; This reaction is heterogeneous.
b) Keq = [Cr3+] / [Ag+]3; This reaction is homogeneous.
c) Keq = [Cr] [Ag+]3 / [Cr3+] [Ag]3; This reaction is heterogeneous.
d) Keq = [Cr3+] / [Ag+]3; This reaction is heterogeneous.
e) Keq = [Ag+]3 / [Cr3+] ; This reaction is homogeneous.