Two aqueous solutions are prepared: 1.00 m Na2CO3 and 1.00 m LiCl. Which of the following statements is true?
A. The Na2CO3 solution has a higher osmotic pressure and higher vapor pressure than the LiCl solution.
B. The Na2CO3 solution has a higher osmotic pressure and higher boiling point than the LiCl solution.
C. The Na2CO3 solution has a lower osmotic pressure and lower vapor pressure than the LiCI solution.
D. The Na2CO3 solution has a lower osmotic pressure and higher boiling point than the LiCl solution.
E. None of these statements is true.
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Ответ:
The
solution has a higher osmotic pressure and higher boiling point than LiCl solution.
Explanation:
As concentrations of two aqueous solutions are same therefore we can write:
where
,
and
are lowering of vapor pressure, elevation in boiling point and osmotic pressure of solution respectively.
is van't hoff factor.
Here both
and LiCl are strong electrolytes.
So,
and ![i(LiCl)=2](/tpl/images/0644/1868/e4bc9.png)
Hence, lowering of vapor pressure, elevation in boiling point and osmotic pressure will be higher for
solution.
Therefore the
solution has a higher osmotic pressure and higher boiling point than LiCl solution.
Ответ:
k thx :)
Explanation: