In: Chemistry
When 18.0 mL of a
2.33×10-4 M aluminum
acetate solution is combined with 22.0 mL
of a 4.80×10-4 M potassium
phosphate solution does a precipitate form? _____(yes or
no)
For these conditions the Reaction Quotient, Q, is equal to
_____?
Ksp (AlPO4) = 9.8 × 10^–21
concentration of phosphate ion in solution = 18*2.33*10^-4/(18+22) = 1.0485*10^-4 M
concentration of Al^3+ ion in solution = 22*4.8*10^-4/(18+22) = 2.64*10^-4 M
ionicproduct of AlPO4(Kip) = [Al3+][PO43-]
= (1.0485*10^-4)*(2.64*10^-4)
= 2.77*10^-8
Q = 2.77*10^-8
SO that, Kip of AlPO4 > Ksp of AlPO4. so that precipitation will be formed.