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# Which of the following is the correct expression for van't Hoff factor?

$\begin{array}{1 1}(a)\;\large\frac{\text{calculated boiling point}}{\text{observed boiling point}}\\(b)\;\large\frac{\text{calculated osmotic pressure}}{\text{observed osmotic pressure}}\\(c)\;\large\frac{\text{observed colligative property}}{\text{calculated colligative property}}\\(d)\;\large\frac{\text{observed molecular weight}}{\text{calculated molecular weight }}\end{array}$

The van’t Hoff factor is a relation between the ideal value of a solution’s colligative properties and the observed colligative properties.
$i=\large\frac{\text{observed colligative property}}{\text{calculated colligative property}}$
edited Jul 16, 2014