Complete the mass balance expression for a saturated solution of Ag2CO3. Note at least one blank is a numeric coefficient. (Note: Ignore any subsequent reactions of Ag .)

Answer 1

Consider what happens to Ag2CO3 in aqueous solution. It dissociates as thus:

Ag2CO3 --> 2Ag^+ + CO3^2-

Now think about reactions of CO3^2- with water. The problem says to ignore Ag+ subsequent reactions.
H2O <-> H3O^+ + OH^-
CO3^2- + H3O^+ <-> HCO3^- + H2O
HCO3^- + H3O^+ <-> H2CO3 + H2O

Mass balance this to get:

Ag^+ = 2(CO3^2- + HCO3^- + H2CO3)