Question

. (a) A solution was prepared by dissolving 1.4295 g of magnesium chloride (MgCl2) into
water and made up to 25.0 mL, calculate the molar concentration of the solution. (3 marks)
(b) A 250.0 mL of 0.50 M solution of sodium phosphate (Na3PO4) solution was prepared
by diluting 1.25 M of stock solution. Calculate the volume of stock solution required. (2 marks)
(c) Solution in (a) was mixed with 50.0 mL of diluted solution in (b), a white precipitate
was formed according to the following unbalanced equation:
MgCl2 (aq) + Na3PO4 (aq)
Mg3(PO4)2 (s) + NaCl (aq)
Calculate the mass of Mg3(PO4)2 formed.