Question

If the percentage by weight of a solution (M.wt., 98 gm/mol) is 31.4% and density of the solution is 1.56 gm/cm³ then the molarity of the solution is ______ M.

Answer 1

Molarity = \(\frac{\mathrm{\%(w/w) \times density \times 10}}{\text{GMM of solute}}\)

\(= \frac{31.4 \times 1.56\times 10}{98}\)

\(= 4.99\)

\(\approx5\)