Let´s demonstrate that the solution volumes are not the addition of its components (solvent + solute). They are non ideal solutions, because there are interactions among its components.
In the case of common salt (sodium chloride, NaCl) dissolved in water, the chlorine ions (Cl-) and Sodium (Na+) interact with the hydrogen bonds of the water so ions and water molecules dispose at lower distance so the volume decreases.
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5 окт 2024