IB Chemistry home > Syllabus 2016 > Stoichiometry > Experimental Data

It's all well and good calculating the theoretical quantities involved in chemical reactions in an ideal world, but we all know that chemistry is carried out in the laboratory and other real life situations.

The actual process of carrying out an experiment may involve losses and errors due to human, instrumental and design faults.

This section deals with such concepts that arise due to the very nature of experimentation.


Reactants can be either limiting or excess.

The experimental yield can be different from the theoretical yield.

Applications and skills

Obtaining and using experimental data for deriving empirical formulas from reactions involving mass changes.

Obtaining and using experimental values to calculate the molar mass of a gas from the ideal gas equation.

Use of the experimental method of titration to calculate the concentration of a solution by reference to a standard solution.

In Chapter 3.6