Will a precipitate of CaSO4 form if 40.0mL of 2.0 x 10^3M CaCl2 is mixed with 60.0mL of 3.0 x 10^-2 Na2SO4?

Answer 1

You want to calculate Qsp and compare with Ksp.
..........CaSO4 ==> Ca^2+ + SO4^2-
Qsp has the same format as Ksp; i.e., Qsp = (Ca^2+)(SO4^2-). Substitute the following.
(Ca^2+) = 2E3M x 40/100 = ? (Note: I wonder if you meant 2.0E-3???
(SO4^2-)= 3.0E-2 x 60/100 = ?

Calculate Qsp. If Qsp > Ksp, a ppt will form. If Qsp < Ksp, a ppt will not form. You will need to look up the Ksp value in your text for CaSO4.