Calculating Maximum [Ca2+] Without Precipitation: Ksp for CaC2O4 = 2.6e-9

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Discussion Overview

The discussion revolves around calculating the maximum concentration of calcium ions ([Ca2+]) that can exist in a solution containing oxalate ions (C2O4 2-) without causing precipitation of calcium oxalate (CaC2O4), given the solubility product constant (Ksp) for calcium oxalate.

Discussion Character

  • Homework-related

Main Points Raised

  • One participant seeks help in applying the given Ksp value and concentration of oxalate ions to find the maximum [Ca2+].
  • Another participant questions the formula for the solubility product of calcium oxalate, suggesting a connection to the Ksp value provided.
  • A different participant expresses confusion regarding the terminology used, indicating a lack of clarity on the relationship between Ksp and solubility.
  • One participant clarifies that Ksp and solubility are related concepts but emphasizes that the Ksp value is already given in the problem.

Areas of Agreement / Disagreement

Participants do not appear to reach a consensus on how to proceed with the calculation, and there is confusion regarding the terminology and formulas involved.

Contextual Notes

Some participants express uncertainty about the application of the Ksp value and the relevant formulas, indicating potential gaps in understanding or missing information from prior lessons.

tornzaer
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Homework Statement



What is the maximum [Ca2+] that can exist with 5.2e-4 M c2O4 2- without precipitating? Ksp for CaC2O4 = 2.6e-9.

Homework Equations



Well, the Ksp and M is given, I don't know how to apply them.

The Attempt at a Solution



I need help because I missed the lesson.

Thank you.
 
Last edited:
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Do you know Kso formula looks alike for calcium oxalate?
 
Pardon? I don't know what you are saying.

If you mean what it is, I don't think I'm supposed to use it since it's not a given in the question.
 
Last edited:
Bump. Someone please help me.
 
Sorry, I wrote Kso instead of Ksp - but these are the same, one stands for solubility, second for solubility product. Do you know formula for solubility product for calcium oxalate? Note that Ksp for calcium oxalate is given.
 

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