........CaSO4 ==> Ca^2+ + SO4^2-
I........solid.....0........0
C........solid.....x........x
E........solid.....x........x
For Na2SO4(aq) ==> 2Na^+ + SO4^2-
I.....0.300M........0........0
C......-0.300......0.300*2...0.300
E........0.........0.600....0.300
Ksp CaSO4 = (Ca^2+)(SO4^2-)
For Ca you can see that is x as well as the solubility.
For SO4^2- you have two sources. From CaSO4 it is x; from Na2SO4 it is 0.300; the total is 0.300+x
Substitute into Ksp expression and solve for x = molar solubility CaSO4.
For
The Ksp of CaSO4 is 4.93× 10–5. Calculate the solubility (in g/L) of CaSO4(s) in 0.300 M Na2SO4(aq) at 25 °C
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