CHEMISTRY / COLLIGATIVE PROPERTIES

Molar Mass from Osmotic Pressure Calculator

Estimate solute molar mass from osmotic pressure data. Review the equation, substituted values, assumptions, and result in one guided chemistry workspace.

01 Calculated in this tab
02 Values stay in this browser tab
03 Use boundary

Use boundary

Calculation path

Estimate solute molar mass from osmotic pressure data. The page evaluates the displayed equation from your supplied values and presents both symbolic and substituted KaTeX working so the arithmetic can be checked.

Calculation path

M=i mRT/(Pi V)

What you provide

Dissolved solute mass expressed in g, using the same scenario as the other inputs
Gas constant expressed in L atm/(mol K), using the same scenario as the other inputs
Absolute temperature expressed in K, using the same scenario as the other inputs
Solution volume expressed in L, using the same scenario as the other inputs
Osmotic pressure expressed in atm, using the same scenario as the other inputs
Van t Hoff factor, using the same scenario as the other inputs

What you receive

Estimated molar mass in g/mol from the stated equation
A symbolic formula plus substituted working with your values
Visible assumptions, field guidance, and an authoritative learning reference

Use boundary

Choose the maximum decimal places shown. This does not increase source accuracy.

The solution is dilute and ideal, temperature is absolute, and the van t Hoff factor is appropriate.

Use internally consistent units and retain extra precision when carrying the result into another calculation.

Reviewed reference factors

OpenStax Chemistry 2e

Molar Mass from Osmotic Pressure Calculator

Calculation path

What you provide

What you receive

Choose the maximum decimal places shown. This does not increase source accuracy.

Reviewed reference factors

Related unit tools