Question

Identify the effect of increasing acidity on the solubility of the given compounds Sr(OH)2 S r( O H) Subscript2 ZnS Z n S PbBr2 P b B r Subscript2 Ca3(PO4)2 C a Subscript3( P O Subscript4) Subscript2 NaI N a I BaCO3

Answer 1

Solubilities of
`Sr(OH)_(2),ZnS,Ca_(3)(PO_(4))_(2) and BaCO_(3)` increases with increasing acidity

Step-by-step explanation:

`Sr(OH)_(2)\rightleftharpoons Sr^(2+)+2 OH^(-)`

Concentration of
`OH^(-)` decreases with increasing acidity. Therefore solubility of
`Sr(OH)_(2)` increases to keep constant solubility product.

`ZnS\rightleftharpoons Zn^(2+)+S^(2-)`

Concentration of
`S^(2-)` decreases with increasing acidity due to formation of
`H_(2)S`. therefore solubility of ZnS increases to keep constant solubility product

`PbBr_(2)\rightleftharpoons Pb^(2+)+2Br^(-)`

Increasing acidity have no effect on this above equilibrium. Therefore solubility of
`PbBr_(2)` remains constant.

`Ca_(3)(PO_(4))_(2)\rightleftharpoons 3Ca^(2+)+2PO_(4)^(3-)`

Concentration of
`PO_(4)^(3-)` decreases with increasing acidity due to formation of
`H_(3)PO_(4)`. Therefore solubility of
`Ca_(3)(PO_(4))_(2)` increases to keep constant solubility product.

`NaI\rightleftharpoons Na^(+)+I^(-)`

Increasing acidity have no effect on this above equilibrium. Therefore solubility of NaI remains constant.

`BaCO_(3)\rightleftharpoons Ba^(2+)+CO_(3)^(2-)`

Concentration of
`CO_(3)^(2-)` decreases with increasing acidity due to formation of
`H_(2)CO_(3)`. Therefore solubility of
`BaCO_(3)` increases to keep constant solubility product.