Applicatino of Raoults Law and melting point

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SUMMARY

The discussion centers on the application of Raoult's Law in relation to the melting point of impure compounds, specifically addressing the impact of insoluble impurities like sodium sulfate. It is established that insoluble impurities do not affect the melting point of a compound, as they do not contribute to vapor pressure changes necessary for melting point depression. The consensus confirms that only soluble impurities can lower the melting point of a compound.

PREREQUISITES
  • Understanding of Raoult's Law
  • Knowledge of melting point depression concepts
  • Familiarity with the properties of soluble vs. insoluble impurities
  • Basic chemistry principles regarding phase changes
NEXT STEPS
  • Research the principles of Raoult's Law in detail
  • Study the effects of soluble impurities on melting point depression
  • Explore phase diagrams and their relevance to melting points
  • Investigate the role of vapor pressure in phase changes
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Chemistry students, educators, and researchers interested in thermodynamics and the effects of impurities on material properties.

Grapz
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Homework Statement


What is the effect of an insoluble impurity such as sodium sulfate, on the observed melting point of a impure compound?


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The Attempt at a Solution



My answer is, there is no effect on the melting point of this particular compound. Because it has to be soluble in order to depress the melting point. If it is insoluble it is just like having 100 % of compound X and 0 % of compound Y, assuming there is only two compounds in this impure compound. Thus the vapor pressure is not effected and melting point will not change.

Is this a correct answer?
 
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Grapz said:
Is this a correct answer?
Yes.
 

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