anonymous
  • anonymous
Which aqueous solution freezes the lowest temperature? a)0.30 m C2H5OH B) 025 M KNO3 C) 0.20 M CaBr2 d) 0.10 m FeCl3 when I calculate the molarity for all of them, it turns out the answer is B but I'm nit sure. please help
Chemistry
chestercat
  • chestercat
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aaronq
  • aaronq
are you sure b) and c) are given in molarity (capital M)
anonymous
  • anonymous
B) 0.25 M
anonymous
  • anonymous
NO small m

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aaronq
  • aaronq
okay, so next time copy the question correctly. capital M is molarity and lowercase m is molality. they're different. Use the formula \(\Delta T=i*m*Kb\) Kb is constant, so focus on the value for i, the van't hoff constant, and the molality. I can tell you it's not b)
anonymous
  • anonymous
thank you so much I did not know they are different. good information
aaronq
  • aaronq
no problem, i hope you can find the answer to your question now
anonymous
  • anonymous
IS IT C right
aaronq
  • aaronq
\(\sf \huge \checkmark\)
anonymous
  • anonymous
^ ^

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