Consider the reactionCaSO4(s) ⇌ Ca2+(aq) + SO42-(aq)At 25 °C, the equilibrium constant is Kc = 2.4 x10-5 forthis reaction. (a) If excess CaSO4(s) is mixed with waterat 25 °C to produce a saturated solution of CaSO4, whatare the equilibrium concentrations of Ca2+ and SO42-?(b) If the resulting solution has a volume of 1.4 L, whatis the minimum mass of CaSO4(s) needed to achieveequilibrium?

a) According to the reaction equation: when Kc = [Ca2+][SO4-] when [Ca2+] = [SO4-] = X and we have…

Answered: Consider the reactionCaSO4(s) ⇌…

Chemistry: The Molecular Science

5th Edition

ISBN:9781285199047

Author:John W. Moore, Conrad L. Stanitski

Publisher:John W. Moore, Conrad L. Stanitski

Chapter12: Chemical Equilibrium

Section: Chapter Questions

Problem 61QRT

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Question

Consider the reaction
CaSO₄(s) ⇌ Ca²⁺(aq) + SO₄^2-(aq)
At 25 °C, the equilibrium constant is Kc = 2.4 x10^-5 for
this reaction. (a) If excess CaSO₄(s) is mixed with water
at 25 °C to produce a saturated solution of CaSO₄, what
are the equilibrium concentrations of Ca²⁺ and SO₄^2-?
(b) If the resulting solution has a volume of 1.4 L, what
is the minimum mass of CaSO₄(s) needed to achieve
equilibrium?

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