AgBr has very low solubility in water. Silver ions form a complex ion with thiosulfate.
c.o't''e'9 Ag+(aq) + 2S2o;-(aq) [Ag(S2
0 3 ) 2 ]
3
-(aq)
If sodium thiosulfate is added to a saturated solution of AgBr in equilibrium with solid AgBr, how
will the concentrations of free Ag+(aq) and Br-(aq) change?
(A) Ag+(aq) decreases, Br-(aq) decreases
(C) Ag+(aq) increases, Br-(aq) decreases
(B) Ag+(aq) decreases, Br-(aq) increases
(D) Ag+(aq) increases, Br-(aq) increases