Question

Under what condition molality and molarity of a solution are identical

Answer 1

Answer:

See below.

Explanation:

Molarity is,

$= \frac{moles}{volume}$

Molality is,

$= \frac{moles}{mass}$

Comparing both the above equations,

$\frac{moles}{volume} = \frac{moles}{mass}\\volume = mass\\\\\frac{mass}{volume} = density = 1$

So the density of the solution has to be 1 kg m^3. The mass and volume need to be equal.