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Posted by on Saturday, January 15, 2011 at 6:44pm.

you made up a standard solution of calcium sulfate (CaSO4). the temperature is 25C. you then add 5.00*10^-3 odium sulfate (Na2SO4). Calculate the concentrations of calcium and sulfate after equilibrium is reached? The pKs of CaSO4 is 4.58.

  • chemistry - , Saturday, January 15, 2011 at 8:00pm

    CaSO4 ==> Ca^+2 SO4^-2
    Ksp = (Ca^+2)(SO4^-2) = 4.58E?? (you had better look up the Ksp because 4.58 can't possibly be correct.)
    You then add 5.00*10^-3 WHAT of Na2SO4.
    Take care of the errors in this and I'll get back to it.

  • chemistry - , Sunday, June 5, 2011 at 8:16am

    the pKs is correct. If you 10 to the negative power of pKs you get the Ks. I'm having a problem witht this problem as well. Any help? And yes, you add 5*10^-3 of Na2SO4.

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