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JoBo

  • 4 years ago

Will a precipitate form if 100ml of 1.0x10^-3 mol/L Pb(NO3)2 solution is added to 100ml of 2.0x10^-3 mol/L MgSO4 solution?

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  1. JoBo
    • 4 years ago
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    @Callisto can you help me?

  2. Callisto
    • 4 years ago
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    Yes... PbSO4 is insoluble

  3. Callisto
    • 4 years ago
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    \[Pb(NO_{3})_{2} (aq) + MgSO_{4} (aq) -> PbSO_{4}(s) + Mg^{2+}(aq) + 2NO_{3} ^{-}(aq)\]

  4. mos1635
    • 4 years ago
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    if Ksp of PbSO4 is given we could have a more acurate investigation.....

  5. JFraser
    • 4 years ago
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    a ppt may or may not form, it depends on the concentrations. Ksp calculations will determine whether the combination of ions is concentrated enough to give a ppt.

  6. Callisto
    • 4 years ago
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    I'm sorry!!! I haven't learnt anything about Ksp ... so I don't know that ppt may not form ... I'm sorry...

  7. JFraser
    • 4 years ago
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    @Callisto you are generally correct, a ppt will probably form because PbSO4 is insoluble, but if the concentrations are weak enough, there won't be a ppt

  8. Callisto
    • 4 years ago
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    @JFraser Thank you for giving more information. Consider this case, would there be any ppt?

  9. JFraser
    • 4 years ago
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    give me a few minutes to work through the numbers, i have to go teach soon

  10. Callisto
    • 4 years ago
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    Thank you!!!!

  11. JFraser
    • 4 years ago
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    in this case,a ppt will not form. the concentration of the combined ions is less than the maximum allowable by the KSP

  12. Callisto
    • 4 years ago
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    Sorry again.. I know I have no right to ask, but can you show how you get the answer?

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