Question

Which gives the more concentrated solution,

(a)${\mathbf{KNO}}_{\mathbf{3}}$In${\mathbf{H}}_{\mathbf{2}}\mathbf{O}$or

(b) ${\mathbf{KNO}}_{\mathbf{3}}$in carbon tetrachloride $\left({\mathbf{CCl}}_{\mathbf{4}}\right)$? Explain.

Short answer

${\mathrm{KNO}}_3$In${\mathrm{H}}_2\mathrm{O}$will give a more concentrated solution than${\mathrm{KNO}}_3$in carbon tetrachloride.

Step-by-step solution

Check the polarity of both solvent and solute

A more concentrated solution means more solute has been dissolved in the solvent. And basic rule behind dissolution is like dissolution like which means a polar solute will be dissolved in a polar solvent and vice versa.

${\mathrm{KNO}}_3$is an ionic salt, which means it is polar in nature Carbon tetrachloride is nonpolar in nature and water is polar in nature.

More solubility, more concentrated the solution

${\mathrm{KNO}}_3$being a polar compound will dissolve more in polar solvent i.e., water. Potassium nitrite is not soluble in non-polar carbon tetrachloride. Because ${\mathrm{KNO}}_3$dissolves to a greater degree in water, it will form a more concentrated solution.