When blood is donated, sodium oxalate solution is used to precipitate Ca²⁺, which triggers clotting. A 108mL sample of blood contains 9.7 x 10⁻⁵ g Ca²⁺/mL. A technologist treats the sample with 100 mL of 0.1550M Na₂C₂O₄. Calculate [Ca²⁺] after the treatment. (CaC₂O₄*H₂O Ksp = 2.30 x 10⁻¹⁹)