Dismiss Notice
Join Physics Forums Today!
The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

The volume of a solution at equilibrium

  1. Apr 30, 2014 #1
    Say that we have a salt solution does the volume of the solution change after when the salt is ionized and equilibrium is achieved ??
  2. jcsd
  3. Apr 30, 2014 #2
    I think what you're asking is whether Vol(salt) + Vol(water) = Vol(solution). The answer is no.

    For sodium chloride and water, Vol(solution) < Vol(salt) + Vol(water). For other salts (e.g. lithium iodide) the opposite can occur. This absurdly long paper (it's paywalled, so go to a university library if you want to read it) gives data for the alkali metal halides.
Share this great discussion with others via Reddit, Google+, Twitter, or Facebook