Question
Calculate the molarity of a solution of ethanol in water in which the mole fraction of ethanol is 0.040.(assume the density of water to be one).
Solution
Mole fraction of ethanol is given by
Our aim is to find the number of moles of ethanol in 1L of the solution which is nearly = 1L of water.
Number of moles in 1L of water
Substituting the values of
in eq. (1) we have
Hence molarity of the solution = 2.31 M
Our aim is to find the number of moles of ethanol in 1L of the solution which is nearly = 1L of water.
Number of moles in 1L of water
Substituting the values of
in eq. (1) we haveHence molarity of the solution = 2.31 M
