The volume of a solution at equilibrium

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The discussion centers on the volume changes in a salt solution after ionization and reaching equilibrium. It clarifies that the total volume of a sodium chloride solution is less than the sum of the volumes of the salt and water, indicating that Vol(solution) is less than Vol(salt) + Vol(water). In contrast, for certain salts like lithium iodide, the total volume can exceed the combined volumes of the components. A referenced paper provides detailed data on this phenomenon for alkali metal halides, though it is paywalled and accessible through university libraries.
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Say that we have a salt solution does the volume of the solution change after when the salt is ionized and equilibrium is achieved ??
 
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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.
 

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