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Author Question: Why is it not good practice to mix two components by simply stirring them together and then ... (Read 53 times)

tiara099

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on: Aug 23, 2018

Why is it not good practice to mix two components by simply stirring them together and then
  sampling them forStirring two solid components together does not yield a homogenous mixture but a coarse
  mixture of particles, lumps, and crystal of the individual compounds. A small sample for a
  melting-point determination taken from the coarse mixture might be 100 of one component.
   a mixed melting point?



Question 2

Look up the melting points of the following compounds in a suitable handbook, Internet site,
  or online source. (See Technique 17, p. 198.) Include the name of your source with your
  answer.
  (a) Quinine
  (b) Indophenol



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ladyjames123

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Reply #1 on: Aug 23, 2018
Answer to Question 1

Stirring two solid components together does not yield a homogenous mixture but a coarse
mixture of particles, lumps, and crystal of the individual compounds. A small sample for a
melting-point determination taken from the coarse mixture might be 100 of one component.



Answer to Question 2

(a) 177 (dec) (www.chemfinder.com)
(b) 160 (CRC, 70 th edition )



tiara099

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Reply #2 on: Aug 23, 2018
Thank you!


ladyjames123

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Reply #3 on: Aug 23, 2018
Always glad to help...


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