If the concentration of phosphate ions ([PO43–]) in a saturated solution of Ca3(PO4)2 is known, which expression should be used to calculate the solubility product constant (Ksp) for Ca3(PO4)2? A. Ksp = 9 [PO43–]5 / 4 B. Ksp = 27 [PO43–]5 / 8 C. Ksp = 3 [PO43–]5 / 2 D. Ksp = 4 [PO43–]5 / 9 E. Ksp = 8 [PO43–]5 / 27

Sodium tripolyphosphate (Na5P3O10) is used in many synthetic detergents. Its major effect is to soften the water by complexing Mg2+ and Ca2+ ions. It also increases the efficiency of surfactants, or wetting agents that lower a liquids surface tension. The K value for the formation of MgP3O103 is 4.0 108 The reaction isMg2+(aq)+P3O105(aq)MgP3O103(aq). Calculate the concentration of Mg2+ in a solution that was originally 50. ppm Mg2+ (50. mg/L of solution) after 40. g Na5P3O10 is added to 1.0 L of the solution.

In the [Ti(H2O)63+] ion, the splitting between the d levels, o, is 55 kcal/mol. What is the color of this ion? Assume that the color results from a transition between upper and lower d levels.

A solution containing copper(II) nitrate (aq) first has some aqueous ammonia added to it. A white precipitate forms.  Addition of more aqueous ammonia results in the precipitate dissolving, forming a clear dark blue solution.  Write reactions for each step in the process.  Hints:  Ksp Cu(OH)2 = 2.2 X 10-20;  Kb NH3 = 1.8 X 10-5 and Kf Cu(NH3)42+ = 1.1 X 1013