When 18.0 mL of a 2.33×10-4 M aluminum acetate solution is combined with 22.0 mL of...

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 _____?

Solutions

Expert Solution

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.

queen_honey_blossom answered 1 year ago

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