van't Hoff factor

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The van’t Hoff factor Consider the situations indicated by the figures below. As far as the solvent is concerned is there any difference? The neutral molecule and the NaCl are taking up the same number of positions. Shown, however are 12 neutral molecules but only 6 formula units of NaCl. Thus, for NaCl the number of moles dissolved needs to be multiplied by 2! neutral molecule Na + ion Cl G ion } Water solutions
The van’t Hoff factor This factor of 2 for NaCl is the (approximate) van’t Hoff factor. This factor, given the symbol “i ”, is greater than 1 for all strong electrolytes.
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van't Hoff factor

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