When aqueous solutions of silver nitrate (AgNO₃) and potassium chromate (K₂CrO₄) are mixed, the blood-red precipitate silver chromate is formed. If 10.0 mL of 0.25 M aqueous silver nitrate is mixed with 15.0 mL of 0.14 M aqueous potassium chromate, what is the TOTAL concentration of ions in the solution after the precipitate has formed?
a. 0.14 M
b. 0.25 M
c. 0.30 M
d. 0.39 M
e. 0.50 M