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Calculate the pH range required to separate 99.99% of Cr3+ from Zn2+ by precipitation of Cr(OH)3(s) in a solution that is initially 0.034 M in both Cr3+ and Zn2+. Use the Ksp values from Table 16.2 of Chang and calculate the pH to the nearest 0.01 pH unit.

Lowest pH=
Highest pH=

  • chemistry -

    Isn't this the same type of problem as the AgBr and Ag3PO4?

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