If 500.0 ml of 0.10 m ca2 + is mixed with 500.0 ml of 0.10 m so42-, what mass of calcium sulfate will precipitate? ksp for caso4 is 2.40*10-5. express your answer to three significant figures and include the appropriate units.

Question

Chemistry

Gregory Reeves

30 September, 17:34

If 500.0 ml of 0.10 m ca2 + is mixed with 500.0 ml of 0.10 m so42-, what mass of calcium sulfate will precipitate? ksp for caso4 is 2.40*10-5. express your answer to three significant figures and include the appropriate units.

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Answers (1)

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Neil Petty · Answer 1

when mixed,

[Ca2+]=0.05 M

[SO4 2-]=0.05 M

so,

let the solubility be s.

so,

s^2=2.4*10^-5

so s=4.9*10^-3 M

so,

moles precipitated=0.05*4.9*10^-3

=0.045

so mass=0.045*136

=6.12 grams