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Qualitative Solubility Predictions

  • Thread starter ncm2
  • Start date
  • #1
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Homework Statement


Which solvent would be a better choice to dissolve each of the following?
Tetracholride or Water
a - thiamine hydrochloride
b - CH3(CH2)16CO2H
c - C6H12
d - CS2
e - NH3
f - (NH4)(CH3CO2)



Homework Equations


Draw the structure and find polarity
Like dissolve like

The Attempt at a Solution


I know water is polar, so will be soluble with other polar molecules
I know tetrachloride is nonpolar, soluable with non polar.

a - thiamine hydrochloride - Polar b/c Vitamin B and C are water soluable, and structure
b - CH3(CH2)16CO2H - Polar b/c CO2H end of chain
c - C6H12 - non polar
d - CS2 - non polar because structure
e - NH3 - polar
f - (NH4)(CH3CO2) - polar b/c CH3CO2

Clearly I have gone somewhere as the answer is wrong. I really don't know if F is right. And also B because it is a long chain of C-H which are not polar.
I have also tried with B and F as non-polar and thats wrong too.
 

Answers and Replies

  • #2
chemisttree
Science Advisor
Homework Helper
Gold Member
3,407
436
I assume that you must get all of them right or the program marks the entire problem as wrong.

Only one of your answers is wrong, not two. 'F' is ammonium acetate... a salt. Polar or non-polar?
 

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