Question

Barium sulfate (BaSO4) is a slightly soluble salt (Ksp = 1.1x10-10), which can dissolve in water to give Ba2+ and SO42-. Taking activity into account, and recalling that SO42- can act like a weak base, which of the following solutions would you expect to have the largest Ba2+ concentration? (a) A solution prepared by mixing 0.10 mol of BaSO4 with enough water to give 1.0 L. (b) A solution prepared by mixing 0.10 mol of BaSO4 with 0.05 mol Na2SO4 and enough water to give 1.0 L. (c) A solution prepared by mixing 0.10 mol of BaSO4 with 0.05 mol NaNO3 and enough water to give 1.0 L. (d) A solution prepared by mixing 0.10 mol of BaSO4 with 0.05 mol H2SO4 and enough water to give 1.0 L. (e) Both (c) and (d)

          Barium sulfate (BaSO4) is a slightly soluble salt (Ksp = 1.1x10-10), which can dissolve in water to give Ba2+ and SO42-. Taking activity into account, and recalling that SO42- can act like a weak base, which of the following solutions would you expect to have the largest Ba2+ concentration?

(a) A solution prepared by mixing 0.10 mol of BaSO4 with enough water to give 1.0 L.
(b) A solution prepared by mixing 0.10 mol of BaSO4 with 0.05 mol Na2SO4 and enough water to give 1.0 L.
(c) A solution prepared by mixing 0.10 mol of BaSO4 with 0.05 mol NaNO3 and enough water to give 1.0 L.
(d) A solution prepared by mixing 0.10 mol of BaSO4 with 0.05 mol H2SO4 and enough water to give 1.0 L.
(e) Both (c) and (d)

Added by Keith P.

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