following precipitation reaction can be used to determine the amount of copper ions dissolved in solution, A chemist added 5.00 x 10"2 L a solution containing 0.173 mol L-' NasPOdoq) to a 5t0 x 102 L sample containing Cuclz(og). This resulted in a precipitate. The chemist fltered, dried, and weighed the precipitate. f 1.21 g of Cus(POJz(5) were obtained