the volumes of 1M HCl and 5M HCl to be mixed to get 2 lit of 2M HCl are? (ans : 1.5lit and 0.5lit)
Dear Student,
Let us suppose that the volume of 1M HCl (V1) = x L
So, Volume of 5M HCl required to make 2 L of 2 M HCl (V2) = (2-x) L
Let us take M1 = 1 M and M2 = 5 M,
We know that, Molarity of a mixture is given by the equation :
(M1V1 + M2V2) / (V1 + V2) = M3
( x + 5(2-x) ) /2 = 2
x + 10 - 5x = 4
x = 1.5 L
Therefore, Volume of 1M HCl = 1.5 L
and Volume of 5 M HCl = (2-x) L = (2-1.5 ) L = 0.5 L