Volumetric Analysis Lab Calculation Question

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Discussion Overview

The discussion revolves around a lab calculation question related to volumetric analysis, specifically focusing on calculating the number of moles of I2 produced from a diluted KIO3 solution. Participants explore the relationship between KIO3 and I2 in the context of a chemical reaction, while addressing uncertainties in the provided information and assumptions.

Discussion Character

  • Homework-related
  • Debate/contested
  • Technical explanation

Main Points Raised

  • One participant seeks help in calculating the moles of I2 from a given volume of diluted KIO3 solution, expressing uncertainty about how to approach the problem.
  • Another participant suggests that the question should focus on determining the amount of I2 produced from KIO3, indicating a reaction where KIO3 produces I2 in a specific stoichiometric ratio.
  • Some participants question the assumption that KIO3 is the source of I2, suggesting that this may not be correct.
  • A participant notes that the information provided may not be sufficient to resolve the question, asking if there is additional context that was not included.
  • One participant references the standard iodometric procedure, implying that the approach taken may not align with established practices in volumetric analysis.
  • Another participant expresses confusion about the question, indicating a lack of clarity regarding the expected procedure or information.
  • There is a suggestion that knowledge of the standard procedure for using potassium iodate is expected for solving the problem.

Areas of Agreement / Disagreement

Participants do not reach a consensus on the assumptions regarding the role of KIO3 in producing I2, and there is uncertainty about the completeness of the provided information. Multiple competing views regarding the correct approach to the problem remain unresolved.

Contextual Notes

Participants highlight potential limitations in the information provided, including assumptions about the reaction and the standard procedures that may not have been fully articulated. There is also a lack of clarity regarding the expected context for the calculation.

supahman
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Homework Statement



Hi there, I am asked this question in one of my lab calculation questions:

Calculate the number of moles of I2 produced from 25 mL of the diluted KIO3 solution.

Information that has already been obtained from my lab:

-Molar concentration of dilute KIO3: 0.00241 + or - .5% M
-Molar concentration of stock KIO3 solution : 0.0241 + or -0.05%

-Mass of I2: 253.8 g/mol
-Mass of KIO3:

Homework Equations



-Avogadro's Constant: 6.02214 X 10^23

The Attempt at a Solution



-Was not able to properly attempt the questions, as I am unsure where to being and how to complete it.
 
Last edited:
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Your question should be, find how much I2 is produced from the given quantity of KIO3. This is assuming that the KIO3 is the source of the produced I2.

Your part of the reaction would include: KIO3 → (1/2) I2

You have enough information for how much moles of KIO3, and you know that half a mole of I2 comes from one mole of KIO3.

By any chance, does the situation have additional important information which you did not include?
 
symbolipoint said:
This is assuming that the KIO3 is the source of the produced I2.

Which is probably not a correct assumption.

(I guess that's what you hinted at in your last statement.)
 
Hey there,

That was all the information I was given. The I2 is what is used to produce the stock KIO3, which is then diluted with filtered water.
 
Huh? I'm actually asked that question... So I really don't know what to make of it. :s
 
Perhaps you are expected to know what the standard procedure is. Potassium iodate is a primary substance, and the way it is used is well known.
 

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