A 30.2 mL aliquot of a 30.0 wt% aqueous KOH solution is diluted to 1.20 L to produce a 0.173 M KOH solution. Calculate the density of the 30.0 wt% KOH solution.

The density of solution is 1.283 g/mL.

Explanation:

Molarity of the KOH before dilution =

Volume of the solution before dilution =

Molarity of the KOH after dilution =

Volume of the solution after dilution =

(1 mL = 0.001 L)

Mass of 0.2076 moles of KOH:

0.2076 mol × 56 g/mol = 11.6256 g

Mass of KOH is solution = 11.6265 g

Mass of the solution = M

Mass percentage of solution = 30.0% of KOH

M = 38.755 g

Density of the solution , d=

The density of solution is 1.283 g/mL.