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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

Calculate ΔS° for the following reaction.N2(g) + O2(g) —> 2NO2(g)Species                       So, J/mol KN2 (g)                                191.5O2 (g)                                205.0NO2 (g)                             240.0

When a diprotic acid is titrated with a strong base, and the Ka1 and Ka2 are significantly different, then the pH vs. volume plot of the titration will have

A solution containing CaCl2 is mixed with a solution of Li2C2O4 to form a solution that is 2.1 × 10-5 M in calcium ion and 4.75 × 10-5 M in oxalate ion. What will happen once these solutions are mixed? Ksp (CaC2O4) = 2.3 × 10-9.

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?

Which of the following compounds will have the highest molar solubility in pure water?

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

The following pictures represent solutions at various points in the titration of a weak acid HA with aqueous KOH. Unshaded spheres represent H atoms, black spheres represent oxygen atoms, and shaded spheres represent A- ions. (K+, H3O+ initially present, OH- initially present and solvent water molecules have been omitted for clarity). Which picture represents the solution after the equivalence point?

A change in pH will significantly affect the solubility of which, if any, of the following compounds?.

Which one of the following changes of state increases the entropy of the system?