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April 20, 2014

Homework Help: AP Chemistry

Posted by Olivia on Saturday, October 20, 2012 at 2:02pm.

Consider the following reaction.
CaSO4(s) Ca2+(aq) + SO42-(aq)
At 25C the equilibrium constant is Kc = 2.4 10-5 for this reaction.
(a) If excess CaSO4(s) is mixed with water at 25C to produce a saturated solution of CaSO4, what are the equilibrium concentrations of Ca2+ and SO42-?
(b) If the resulting solution has a volume of 5.5 L, what is the minimum mass of CaSO4(s) needed to achieve equilibrium?

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