Crystallization Yield Calculator

Summary

Enter solubility at hot and cold temperatures plus the initial mass dissolved to calculate the theoretical crystal yield and percent recovery.

How it works

1. Enter the solubility of the solute at the hot (dissolution) temperature in g per 100 g solvent.
2. Enter the solubility at the cold (crystallization) temperature in g per 100 g solvent.
3. Enter the mass of solute you started with (dissolved at the hot temperature).
4. The calculator derives the mass of solvent used from the hot-solubility figure, then applies cold-solubility to find what stays dissolved.
5. Theoretical crystal yield = initial mass minus mass remaining in cold solution.
6. Enter actual recovered mass to calculate percent recovery and compare against the theoretical maximum.

Use cases

• Predict how many grams of product to expect from a recrystallization purification step.
• Evaluate whether a chosen solvent system gives acceptable recovery at a given cool-down temperature.
• Scale lab results to pilot or industrial batch sizes by keeping the mass ratio constant.
• Compare theoretical vs. actual yield to assess losses from crystal handling, filtration, or solvent occlusion.
• Teach students the relationship between solubility curves and crystal recovery in introductory chemistry labs.
• Optimize the cold temperature setpoint to balance yield against purity requirements.

Frequently Asked Questions