[chiaki_asuka09]

At the start of a membrane equilibrium experiment, the first compartment contains 1.0 L of solution with an NaX concentration of 0.10 mol/L, where X^- cannot pass through the membrane. The second compartment has 2.0 L of 0.030 M NaCl. Find the concentration of Cl^- ions in the first compartment after equilibrium is established.

i don't know what to do with the volumes given. From what I know, Na+ in the first compartment and 2nd compartment should be equiomolar. so i'm stuck. help please. thanx.

[Phlogiston]

At the start of a membrane equilibrium experiment, the first compartment contains 1.0 L of solution with an NaX concentration of 0.10 mol/L, where X^- cannot pass through the membrane. The second compartment has 2.0 L of 0.030 M NaCl. Find the concentration of Cl^- ions in the first compartment after equilibrium is established.

i don't know what to do with the volumes given. From what I know, Na+ in the first compartment and 2nd compartment should be equiomolar. so i'm stuck. help please. thanx.

What makes you think sodium must be equimolar?  The only thing that needs to be true at equilibrium is that the chemical potentials must be equal.