Reference no: EM13209676
a) Calculate pH of saturated solution of dicalcium phosphate (CaHPO4) in water if its solubility is 3.16x10-4 m.
CaHPO4(aq)-> Ca^2+(aq) + HPO4^2-(aq)
Although phosphoric acid is a triprotic acid, consider only pKa'' since pKa' and pKa''' will not contribute to this dissociation:
H2PO4^-(aq)->H+(aq)+ HPO4^2-(aq), pKa''=6.8
Assume that:
• CaHPO4 is a strong electrolyte;
• Ionic strength of CaHPO4 in water is negligible due to low concentration
b) How much solubility of CaHPO4 will change when 1.0x10-3 m MgCl2 is added to the same saturated solution of dicalcium phosphate?
Assume that :
• MgCl2 is a strong electrolyte and very soluble in water;
• Ionic strength cannot be ignored;
• Precision of a single iteration, whenever necessary, is sufficient;
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Compute ph of saturated solution of dicalcium phosphate
: Calculate pH of saturated solution of dicalcium phosphate (CaHPO4) in water if its solubility is 3.16x10-4 m. How much solubility of CaHPO4 will change when 1.0x10-3 m MgCl2 is added to the same saturated solution of dicalcium phosphate?
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