Calculate the  number  of  moles  of   methhanol  in  5L of  its  2m  solution if  the  density  of   solution  is 0.981Kg/L

Asked by pardeepkumar2281 | 13th May, 2018, 08:06: AM

Expert Answer:

Given:
Volume = 5L
Molality= 2m
Density =0.981Kg/L
 
We have,
 
m= (M)/  d-M×  M
 
Where
d = density
M= Molarity
Mb = Molar mass
Substituting the values, we get
 
M= 1.842 M
 
No. of moles = volume × molarity
 
                   = 5× 1.842
 
                   = 9.21 moles
 
 
M = 
M= 

Answered by Varsha | 13th May, 2018, 09:54: PM