For the reaction: PbSO4(s) ⇌ Pb2+(aq) + SO42-(aq) (2) a. Estimate the solubility product (Ksp) at 42.0 oC (hint; assume

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For the reaction:
PbSO4(s) ⇌ Pb2+(aq) + SO42-(aq)
(2)
a. Estimate the solubility product (Ksp) at 42.0 oC
(hint; assume the enthalpy and the entropy change to be
independent of the temperature).
b. Which is the spontaneous direction of the reaction at 42
oC when the molar
concentration for the Pb2+ and
SO42- ion is 5.0 ×
10-6 and 6.0 × 10-7,
respectively?
c. When water is added to an aqueous saturated solution of
PbSO4 in which reaction 2 is
at chemical equilibrium:
i. Do you expect the reaction free energy (ΔGrun) to become
negative or positive?
ii. Based on you answer in Problem 7ci, explain whether you
expect more or less
PbSO4 to be dissolved.