Determination of observed molar mass of solute

1.	Determination of observed molar mass of solute
Answer» Explanation: can USE a measurement of any one of the following properties to determine the MOLAR mass (molecular weight) of an unknown that is the SOLUTE in a solution: Boiling Point Elevation Freezing Point Depression Osmotic Pressure From Boiling Point Elevation Determine the change in boiling point from the observed boiling point of the solution and the boiling point of the pure solvent. Equation for delta t Determine the molal concentration, m, from the change in boiling point and the boiling point elevation constant. Equation to determine molality Determine the moles of unknown (the solute) from the molality of the solution and the mass of solvent (in kilograms) used to make the solution. Equation for CALCULATING molality Equation for calculating moles from molality Determine the molar mass from the mass of the unknown and the NUMBER of moles of unknown.

Answer»

Explanation:

can USE a measurement of any one of the following properties to determine the MOLAR mass (molecular weight) of an unknown that is the SOLUTE in a solution:

Boiling Point Elevation

Freezing Point Depression

Osmotic Pressure

From Boiling Point Elevation

Determine the change in boiling point from the observed boiling point of the solution and the boiling point of the pure solvent.

Equation for delta t

Determine the molal concentration, m, from the change in boiling point and the boiling point elevation constant.

Equation to determine molality

Determine the moles of unknown (the solute) from the molality of the solution and the mass of solvent (in kilograms) used to make the solution.

Equation for CALCULATING molality

Equation for calculating moles from molality

Determine the molar mass from the mass of the unknown and the NUMBER of moles of unknown.

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