To determine the solubility product constant (Ksp) at 50 C?

for Ni(IO3)2 a chemist prepares a saturated solution of the salt at this temperature. They filter and remove a 10.00 mL aliquot of this solution, and add 50.0 mL of distilled water, 2 g of KI and 10 mL of 3 M HCl to the flask. Thiosulfate solution is added to the flask and after 2% starch solution is added it turns blue. The chemist keeps adding thiosulfate solution from the burette until the solution in the flask turns colorless. It takes 14.55 mL of 5.12×10−2M Na2S2O3 to reach the endpoint of the titration.