# molality

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## molality

[mo-lal´ĭ-te]
the number of moles of a solute per kilogram of solvent. See also molarity.

## mo·lal·i·ty (m),

(mō-lal'i-tē),
Moles of solute per kilogram of solvent; the molarity is equal to mρ/(ltmM), where m is the molality, ρ is the density of the solution, and M is the molar mass of the solute. Compare: molarity.

## molality

/mo·lal·i·ty/ (mo-lal´it-e) the number of moles of a solute per kilogram of pure solvent. Cf. molarity.

## molality

[mōlal′itē]
Etymology: L, moles, mass
the number of moles of solute per kilogram of water or other solvent. It refers to the solution concentration.

## molality

A fraction of a solution expressed in moles of solute/kg of solvent.

## mo·lal·i·ty

(mō-lal'i-tē)
Moles of solute per kilogram of solvent; the molarity is equal to mρ/(1 + mM), where m is the molality, ρ is the density of the solution, and M is the molar mass of the solute.
Compare: molarity

## molality

Number of moles (see MOLE 2.) of solute in 1000 g of solvent.

## molality

the number of MOLES of a solute present in a kilogram of pure solvent.

## molality

the number of moles of a solute per kilogram of solvent.
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References in periodicals archive ?
Glucose and water distribute freely between erythrocytes and plasma; therefore, the molality (but not the concentration) of glucose is identical in erythrocytes and plasma.
The molality results from the direct-reading sensor can be multiplied by a factor derived from the ratio of the water concentrations of calibrator and sample to yield the true glucose concentration.
The sensor detects molality, but the system reports results relative to the concentration (not molality) of glucose in the calibration solution.
This result is expected because the direct biosensor detects molality (amount of glucose per unit of water mass in the sample), which is identical in whole blood and its separated plasma.
The latest generation of direct-reading glucose biosensors measures molality of glucose (amount of glucose per kilogram of water) in undiluted plasma or whole blood.
Biosensors that require dilution before measurement will underestimate molality, because when whole blood is diluted, e.
Furthermore, a new quantity and reference interval based on molality would probably not be accepted in clinical practice.
We found that a standardized conversion was best, resulting in better agreement when molality was converted to glucose concentration for patients' samples.

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