\(\therefore \,\,\,\,\frac{{25 - 24.5}}{{25}} = \frac{{W \times 1000 \times {M_0}}}{{M \times {W_0} \times 1000}}\) (\(1000\) વડે ગુણીને ભાગતાં)
\(\therefore \frac{{0.5}}{{25}} = \) (મોલાલિટી) / \(1000\) \( \times {M_0}\)
મોલાલિટી \( = \frac{{500}}{{25 \times 18}} = \frac{{20}}{{18}} = 1.11\)