How Can I Identify Ions in a Mixture During a Practical Experiment?

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Discussion Overview

The discussion focuses on identifying anions and cations in a solution during a practical experiment. Participants explore methods for determining solubility and the formation of precipitates, specifically involving ions such as Pb, Ba, Ca, Cu, Fe2, Fe3, CO3, Cl, PO, SO, and NO3.

Discussion Character

  • Experimental/applied, Technical explanation, Homework-related

Main Points Raised

  • One participant seeks information on the solubility of ionic compounds formed from a specified list of cations and anions, expressing uncertainty about the meaning of 'relevant solubility.'
  • Another participant suggests searching for the solubility product of binary compounds formed from the listed ions, clarifying the roles of metals as cations and nonmetals or polyatomics as anions.
  • A third participant recommends looking up solubility rules, noting that while they are simplified, they may be adequate for the experiment.
  • A later reply acknowledges the usefulness of the provided information.

Areas of Agreement / Disagreement

Participants do not appear to reach a consensus on the best approach to determine solubility, as they suggest different resources and methods for identifying ions.

Contextual Notes

There are limitations regarding the clarity of 'relevant solubility' and the potential errors in the practical experiment that remain unaddressed. The discussion does not resolve how to improve the reliability of results.

Who May Find This Useful

This discussion may be useful for students or practitioners involved in chemistry experiments, particularly those focused on identifying ions in solutions and understanding solubility concepts.

chopstick
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I am prepare for a practical experiment,
this is a practical experiment aim to identify the anions and cations in the solution,
and those ions are choosed from Pb, Ba, Ca, Cu,Fe2, Fe3 and CO3, Cl, PO, SO, NO3.
where can i find the solubility in water for any ionic compound that can be formed from above pair from internet, even i found it, how do i known whether it is soluble or insoluble. i have found some solubility in 'revelant solubility', i don't know what it means.

so far i have been told that the flame test is not available, so it mainly focused on the observation for the precipitate it formed. what could be the erorrs or something should be aware of to avoid errors, and what could be done to improve the reliability of the result.
 
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Search on the solubility product for all of the binary compounds you can make between the anions and cations on that list. Assume the metals are cations and the nonmetals and polyatomics are anions.
 
You may also google for solubility rules - while simplified, they can be sufficient for your task.


Chemical calculators at
 
those information are very useful, thank you.
 

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