Available are `1L` of `0.1M NaCl` and `2L` of `0.2M CaCl_(2)` solutions. Using only these two solutions what maximum volume of a solution can be prepared having `[Cl^(-)]=0.34M` exactly. Both electrolytes are strong

Options

A. 2.5 L
B. 2.4 L
C. 2.3 L
D. None of these

Answer

A

Explanation

Let volumes taken to be 'x' & 'y' litres, so `(0.1x+0.4y)/(x+y)=0.34`... (i)
& `V_g=(x+y)`(to be maximised)....(ii)
So, y=4x so for maximum volume
`y=2L " " & " " x=1/2L`