chiaki_asuka09 Posted July 16, 2009 Share Posted July 16, 2009 Here's my problem: 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. okay. i usually know how to solve this type of problem if the volume of the solutions in the first compartment and second compartment are equal. Our professor said that for a donnan equilibrium it is important that volume of the solutions are equal. However, in the given problem, it is not equal and now, i do not know what to do. thank you. Link to comment Share on other sites More sharing options...
Psycho Posted July 16, 2009 Share Posted July 16, 2009 (edited) You have the same amount of Cl- ions in 1 litre of 0.060M solution or 4 litres of 0.015M solution, presuming you don't have to work out how long it would take to reach equilibrium in which case the concentration will matter, the volumes can be interchanged if the concentration is change proportionality. Volume (L) X Concentration (M) = Moles Edited July 16, 2009 by Psycho Added Relvant equation Link to comment Share on other sites More sharing options...
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