# Which of the next salts have better solubility in 1.0M NH3 than in distilled water? Na2CO3, KCl, AgBr, KNO3

Aug 11, 2017

The silver salt...........

#### Explanation:

The silver halides are as soluble as bricks in aqueous solution......i.e. we can represent the reaction by....

$A {g}^{+} + B {r}^{-} \rightarrow A g B r \left(s\right) \downarrow$

Silver bromide precipitates from solution as a curdy, cream-coloured solid. We can increase the proportion of silver ion that remains in solution by adding aqueous ammonia, which participate in the following complexation equilibrium......

$A g B r \left(s\right) + 2 N {H}_{3} \left(a q\right) \rightarrow {\left[A g {\left(N {H}_{3}\right)}_{2}\right]}^{+} + B {r}^{-}$

The equilibrium will move to the right hand side as ammonia is added.....These questions can be approached quantitatively given (i) ${K}_{\text{sp}}$ for $A g B r$, and (ii) ${K}_{f}$ for ${\left[A g {\left(N {H}_{3}\right)}_{2}\right]}^{+}$.