A generic salt, AB2, has a molar mass of 293 g/mol and a solubility of 3.90 g/L at 25 °C. What is the Ksp…?

NetherCraft 0

of the salt at 25 degrees C?

Please help. I’m super confused. Thanks. ^_^

4 Answers

  • Ksp = [A++]*[B-]^2

    ?M AB2 = 3.90 g/L x 1 mole / 293 g = 0.0133 M

    [A++] = 0.0133 M

    [ B-] = 0.0266 M

    Ksp = [0.0133]*[ 0.0266 ]^2 = 9.41x10E-6

  • AB2=3.90g/L x 1 mole/ 293 g=0.0133 M

    [A++]= 0.0133 M

    [B-]= 0.0133 x 2 = 0.0266

    Ksp= [0.0133] x [0.0266]^2 = 9.41 x 10^-6

  • multiply by two, since the equation is AB2 –> A^2+ + 2B^2-

    Therefore, 2*.0133=.0266

    However, since the solubility equation requires the coefficient to be moved up as a power, you still have to square the .0266

  • how’d you get the B-

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