Problem: A solution contains 2.0 X 10 -3 M Ce3+ and 1.0 X 10 -2 M IO3 3-. Will Ce(IO3)3(s) precipitate? [Ksp for Ce(IO3)3 is 3.2 X 10-10.]

FREE Expert Solution

• Q > Ksp: the solution is supersaturated and a precipitate will form. Reactants are favored.

• Q = Ksp: the solution is at equilibrium and no precipitate will form.

• Q < Ksp: the solution is unsaturated and no precipitate will form. Products are favored.


For Ce(IO3)3(s):

The sulfate ion, IO3, has a charge of –1. Ce then has a charge of +3. 

The dissociation of Ce(IO3)3(s) in water is as follows:


Ce(IO3)3(s)  Ce3+(aq) + 3 IO3(aq)


Calculate the reaction quotient for Ce(IO3)3 is:


Q=productsreactantsQ=[Ce3+][IO3-]3


Note that each concentration is raised by the stoichiometric coefficient: [Ce3+] is raised to 1 and [IO3] is raised to 3.


Solving for Q:

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Problem Details

A solution contains 2.0 X 10 -3 M Ce3+ and 1.0 X 10 -2 M IO3 3-. Will Ce(IO3)3(s) precipitate? [Ksp for Ce(IO3)3 is 3.2 X 10-10.]

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What scientific concept do you need to know in order to solve this problem?

Our tutors have indicated that to solve this problem you will need to apply the Selective Precipitation concept. If you need more Selective Precipitation practice, you can also practice Selective Precipitation practice problems.

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Based on our data, we think this problem is relevant for Professor Hummel's class at UIUC.

What textbook is this problem found in?

Our data indicates that this problem or a close variation was asked in Chemistry: An Atoms First Approach - Zumdahl Atoms 1st 2nd Edition. You can also practice Chemistry: An Atoms First Approach - Zumdahl Atoms 1st 2nd Edition practice problems.