In biological applications it is often preferable to measure solution concentrations in molality rather than molarity especially if comparing solutions of two different substances This is because?

Answer 1

if one scientist reports concentrations measured in molality, another scientist elsewhere can exactly replicate the work. This is not possible with molarity.

I chose the above answer on my quiz and it was actually incorrect. The correct answer should be - two solutions of the same molality have equivalent ratios of solute to water, but two solutions of the same molarity may not have equivalent ratios.

Answer 2

molality is preferred because it measures the amount of solute per mass of solvent, which is more temperature-independent compared to molarity. This makes it more accurate for comparing solutions of different substances since changes in temperature do not affect molality measurements.