A asked in Science & MathematicsChemistry · 1 month ago

For Ag2SO4, Ksp = 1.7 x 10^-5. How many grams of Na2SO4 must be added to 100. mL of 0.022 M AgNO3 to just initiate precipitation? ?

Full question: For Ag2SO4, Ksp = 1.7 x 10-5. How many grams of Na2SO4 (MM = 142.0 g/mol) must be added to 100. mL of 0.022 M AgNO3 to just initiate precipitation? 

Please describe your answers clearly and please include steps. 

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  • 1 month ago
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    Ksp = [Ag+]^2 [SO42-] = 1.7X10^-5

    1.7X10^-5 = (0.022)^2 [SO42-]

    [SO42-] = 0.035 M

    0.035 mol/L X 0.100 L X 142.04 g/mol Na2SO4 = 0.499 g Na2SO4 

    (should be rounded to 0.50 g Na2SO4)

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