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28 March, 00:14

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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  1. 28 March, 00:33
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    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
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