Respuesta :
Answer:
Ca3(PO4)2- Increase in solubility
Barium hydroxide- increase in solubility
Magnesium carbonate- increase in solubility
Copper II sulphide- increase solubility
Lead II bromide- increase solubility
CuI - increase solubility
Explanation:
Calcium phosphate solubility is pH dependent. At lower pH, calcium phosphate is more soluble in water while at pH above 8.5, the solubility of calcium phosphate decreases markedly.
For Barium hydroxide and magnesium carbonate,decreasing the pH will increase the solubility of the compound.
For copper II sulphide,decreasing the pH will lead to a greater solubility. Also, lead II bromide is ordinarily insoluble in water but it's solubility increases with decreasing pH.
CuI is insoluble in water but soluble in dilute hydrochloric acid.
The increase in the pH of the solution increases the solubility of the given ionic compounds such as [tex]\bold {CuS }[/tex] and [tex]\bold {CuI}[/tex].
Solubility & pH:
- The solubility of the ionic compound increase with a decrease in the pH of the solution because it shifts the equilibrium in water.
- The solubility is unaffected for the conjugate bases of the strong acids.
All given compounds are ionic compounds,
Therefore, the increase in the pH of the solution increases the solubility of the given ionic compounds.
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