Question

If the osmotic pressure of glucose solution is 1.52 bar at 300K. What would be its
concentration if R=0.083Lbar
mol

​

Answer 1

Answer:

ANSWER

As per the van't Hoff equation, the relationship between the osmotic pressure and the molar concentration is  Π=CRT. Here, R is the ideal gas constant and T is absolute temperature.

C  

1

​  

=  

180

36

​  

 M

(Note: Molar mass of glucose is 180 g/mol and molar concentration is the ratio of number of moles of glucose to the volume of solution in L. Number of moles is the ratio of mass to molar mass).

Π  

1

​  

=4.98 bar

C  

2

​  

= ?

Π  

2

​  

=1.52  bar

4.98=  

180

36

​  

 RT ......(i)

1.52=C  

2

​  

 RT ......(ii)

Divide equation (ii) with equation (i),  

36

C  

2

​  

 

​  

×180=  

4.98

1.52

​  

 

C  

2

​  

=0.061 M

Hence, second solution has concentration of 0.061 M.

Explanation:

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