Answer:
0.13 m of
→ Highest boiling point
0.19 m of
→ Second Highest boiling point
0.17 m of
→ Third highest boiling point
0.31 m Sucrose (nonelectrolyte) → Lowest boiling point
Explanation:
Elevation in boiling is given by :
![\Delta T_b=i\times k_b\times m](https://tex.z-dn.net/?f=%5CDelta%20T_b%3Di%5Ctimes%20k_b%5Ctimes%20m)
Where :
i = van't Hoff factor
= Molal Elevation constant of solvent
m = molaity of the solution
1) 0.19 m of ![AgNO_3](https://tex.z-dn.net/?f=AgNO_3)
![AgNO_3\rightarrow Ag^++NO_3^{-}](https://tex.z-dn.net/?f=AgNO_3%5Crightarrow%20Ag%5E%2B%2BNO_3%5E%7B-%7D)
i = 2 (electrolyte)
Molality of the solution = 0.19
Elevation is boiling point of solution:
![\Delta T_b=2\times k_b\times 0.19 m](https://tex.z-dn.net/?f=%5CDelta%20T_b%3D2%5Ctimes%20k_b%5Ctimes%200.19%20m)
![\Delta T_b=0.38 m\times k_b](https://tex.z-dn.net/?f=%5CDelta%20T_b%3D0.38%20m%5Ctimes%20k_b)
2) 0.17 m of ![CrSO_4](https://tex.z-dn.net/?f=CrSO_4)
![CrSO_4\rightarrow Cr^{2+}+SO_4^{2-}](https://tex.z-dn.net/?f=CrSO_4%5Crightarrow%20Cr%5E%7B2%2B%7D%2BSO_4%5E%7B2-%7D)
i = 2 (electrolyte)
Molality of the solution = 0.17
Elevation is boiling point solution :
![\Delta T_b=2\times k_b\times 0.17 m](https://tex.z-dn.net/?f=%5CDelta%20T_b%3D2%5Ctimes%20k_b%5Ctimes%200.17%20m)
![\Delta T_b=0.34 m\times k_b](https://tex.z-dn.net/?f=%5CDelta%20T_b%3D0.34%20m%5Ctimes%20k_b)
3) 0.13 m of ![Mn(NO_3)_2](https://tex.z-dn.net/?f=Mn%28NO_3%29_2)
![Mn(NO_3)_2\rightarrow Mn^{2+}+2NO_3^{-}](https://tex.z-dn.net/?f=Mn%28NO_3%29_2%5Crightarrow%20Mn%5E%7B2%2B%7D%2B2NO_3%5E%7B-%7D)
i = 3 (electrolyte)
Molality of the solution = 0.13
Elevation is boiling point solution :
![\Delta T_b=3\times k_b\times 0.13 m](https://tex.z-dn.net/?f=%5CDelta%20T_b%3D3%5Ctimes%20k_b%5Ctimes%200.13%20m)
![\Delta T_b=0.39 m\times k_b](https://tex.z-dn.net/?f=%5CDelta%20T_b%3D0.39%20m%5Ctimes%20k_b)
4) 0.31 m Sucrose (nonelectrolyte)
i = 1 ( non electrolyte)
Molality of the solution = 0.31 m
Elevation is boiling point solution :
![\Delta T_b=1\times k_b\times 0.31 m](https://tex.z-dn.net/?f=%5CDelta%20T_b%3D1%5Ctimes%20k_b%5Ctimes%200.31%20m)
![\Delta T_b=0.31 m\times k_b](https://tex.z-dn.net/?f=%5CDelta%20T_b%3D0.31%20m%5Ctimes%20k_b)
Higher the value of elevation in temperature higher will be the boiling point of the solution .
The decreasing order of solution from highest boiling point to lowest boiling point is :
![0.39 m\times k_b>0.38 m\times k_b>0.34 m\times k_b>0.31 m\times k_b](https://tex.z-dn.net/?f=0.39%20m%5Ctimes%20k_b%3E0.38%20m%5Ctimes%20k_b%3E0.34%20m%5Ctimes%20k_b%3E0.31%20m%5Ctimes%20k_b)
0.13 m of
→ Highest boiling point
0.19 m of
→ Second Highest boiling point
0.17 m of
→ Third highest boiling point
0.31 m Sucrose (nonelectrolyte) → Lowest boiling point