Jasper v.10 JavaScript Percentage Elemental Composition Calculator

Instructions / Practice Problems

Problem: You submitted a sample with the expected MF of C9H19N3 to microanalysis. However, the found values differ from the calculated ones:

You can now guess what impurity or solvent caused this difference by inputting up to 3 different molecular formulas of solvents or potential impurities. (Many times a good guess is water or the last solvent used e.g for recrystallization or carbon dioxide from air or salts like HCl ect.)

Here it was assumed that the product contained water:

Indeed, the program found, that the analysis fits with 0.45 moles of water:

Sometimes such a calculation gives a clue how to purify or dry the sample, in many other cases solvents or salts are part of the crystal and indeed constitute the molecular formula!

If you still have problems with this program feel free to write me an email!