Consider a reaction that has a negative ΔH and a negative ΔS. Which of the following statements is TRUE?

Calculate Ksp for PbI2 at 25°C based on the following data:Species                       ∆G0f, kJ/mol Pb2+ (aq)                        -24.4I- (aq)                              -51.6PbI2  (s)                           -173.6

The following plot shows two titration curves, each representing the titration of 50.00 mL of 0.100 M acid with 0.100 M NaOH. Which point a-d represents the equivalence point for the titration of a weak acid?

A 10.0-mL sample of 0.75 M CH3CH2COOH is titrated with 0.30 M NaOH. What is the pH of the solution after 22.0 mL of NaOH have been added to the acid? Ka = 1.3 x 10–5

Give the expression for the solubility product constant for Ca3(PO4)2.

Which of the following substances has the greatest solubility in water?

A saturated solution of calcium hydroxide, Ca(OH)2, is in contact with excess solid Ca(OH)2. Which of the following statements correctly describes what will happen when aqueous HCl (a strong acid) is added to this mixture, and system returns to equilibrium? For Ca(OH)2, Ksp = 6.5 x 10-6

A lab technician adds 0.015 mol of KOH to 1.00 L of 0.0010 M Ca(NO3)2. Ksp = 6.5 x 10–6 for Ca(OH)2. Which of the following statements is correct?

The following pictures represent solutions of CuS, which may also contain ions other than Cu2+ and S2- which are not shown. Gray spheres represent Cu2+ ions and dotted spheres represent S2- ions.If solution (1) is a saturated solution of CuS, which of solutions (2)-(4) are unsaturated?

In which of the following solutions would solid PbCl2 be expected to be the least soluble at 25°C?