Question

When an aqueous solution of CaCl2 is mixed with an aqueous solution of Na3PO4, a chemical reaction occurs resulting in the formation of Ca3(PO4)2 and NaCl. This is shown by the chemical equation: 3CaCl2 (aq) + 2Na3PO4 (aq) → Ca3(PO4)2 (s) + 6NaCl (aq) a. Describe a method for separating Ca3(PO4)2 from the product mixture.

b. Once the Ca3(PO4)2 has been removed, the NaCl can be recovered. Describe a method for recovering the NaCl from the aqueous solution.

Answer 1

ans a) by decantation and filteration we can seperate the Ca3(PO4)2 because it precipitates out.

or

Ca3(PO4)2 is insoluble in water or slightly soluble . since its a solid it may settle down at the bottom of vessel of its own. if it not settle then placed the solution in test tube or cetrifuged tube and centrifuged it. after it pour off the clear liquid and then we have seperated the ions in solution from the insoluble product mixture.

b)NaCl can be recovered by boiling the water so that water evaporate leaving behind the salt.