The solubility of an unknown salt is shown in the graph.  If a solution is unsaturated at 30 oC, what happens when the solution is cooled?

For the decomposition of mercury(II) oxide, HgO, to mercury and oxygen:                                            2HgO(s) → 2Hg(l) + O2(g) ΔGo = 117.1 kJ What is the standard Gibbs free energy of formation (ΔGfo) of mercury(II) oxide?

The pain reliever codeine is a weak base with a Kb equal to 1.6×10–6. What is the pH of a 0.05 M aqueous codeine solution?

What is the pH of a buffer made by combining 45.0 mL of 0.150 M nitrous acid and 20.0 mL of 0.175 M sodium nitrite?  The Ka of nitrous acid, HNO2, is 4.5×10–4.

What is the molar concentration of an aqueous sugar solution with an osmotic pressure of 318.4 mmHg at 25 oC? 1 atm = 760 mmHg and R = 0.0821 (L·atm)/(mol·K)  

What mass of platinum could be plated on an electrode from the electrolysis of a Pt(NO3)2 solution with a current of 0.500 A for 55.0 s?  The molar mass of platinum is 195.1 g∙mol–1.

What is the balanced equation when emits an alpha particle?

What will be the result if 100 mL of 0.06 M Mg(NO3)2 is added to 50 mL of 0.06 M Na2C2O4?  Assume the reaction is taking place at 25 °C.  (Ksp of MgC2O4(s) at 25 °C = 8.6×10–5)

Which 0.10 M solution will have the largest concentration of hydroxide ion?

When the reaction:         CH3Cl(g) + H2O(g)