Question

For each of the following compounds, decide whether the compound's solubility in aqueous solution changes with pH. If the solubility does change, pick the pH at which you'd expect the highest solubility. You'll find K., data in the ALEKS Data tab. highest solubility compound Does solubility change with pH? pH = 4 pH = 3 pH = 2 yes Ag C1 O no Na Br Caz(PO4), ОО x 5 ?

Answer 1

Solution:

1) AgCl : Yes

Higher solubilty at pH = 4

Reason:

AgCl is a salt of weak base (AgOH) and strong acid (HCl). Hence, at higher pH, its solubility increases.

2) NaBr: No

Reason:

NaBr is considered as a neutral salt. It is a salt of strong acid (HBr) and strong base (NaOH). Hence, its solubility is unaffectected.

3) Ca3(PO4)2 : Yes

Higher solubility = pH 2

Reason:

Calcium phosphate is a salt of weak acid (H3PO4) and slightly stronger base (Ca(OH)2). Hence, its solubility increases with decreasing pH.