Activities
Measuring rate of reaction
The rate of the reaction between calcium carbonate and hydrochloric acid is followed by two different methods and the two methods are compared. One follows the loss in mass as carbon dioxide is evolved...
Activities
Enthalpy changes
This practical on enthalpy changes is in two parts. The first part records the increase in temperature of the reaction between zinc and copper(II) ions over time and the need for extrapolation. The second...
Activities
Preparation of nylon 6,6
The preparation of nylon 6,6 is a fun practical to do and gives you hands-on experience of carrying out a polycondensation reaction (covered in AHL S2.4.6) and practice at writing relevant equations for...
Activities
3-D molecular modelling
This is an exercise for you to build three-dimensional representations of simple molecules and ions rather than just make or see virtual models on a two-dimensional screen. This will help you apply VSEPR...
Activities
Determining the Mr of an unknown gas
This practical requires you to use your knowledge and understanding of the gas laws and the definition of molar molecular mass to devise your own experiment to find the molecular mass of an unknown gas....
Activities
Formula of magnesium oxide
This practical uses combustion and gravimetric analysis to determine the empirical formula of magnesium oxide and trains you in questioning the underlying assumptions made in the procedure. You may well...
Activities
Percentage of copper in brass
Determining the percentage of copper in brass using redox reactions and a titration. Brass objects have been found dating back as far as 5000 BCE. Brass has many different uses, for example, musical instruments,...
Experimental programme & IA
History of Internal Assessment
This page provides background information for teachers to see how the assessment of practical work by the IB has developed over the past fifty years to reach the current assessment model. Understanding...
Experimental programme & IA
Marking & internally standardizing the IA
This page looks at how you mark your own student's draft and final versions of their IA report and then suggests how you should carry out internal moderation within your own school if more than one teacher...
Experimental programme & IA
Submitting IA marks & samples for moderation
Details how to submit your students' Internal Assessment marks to the IB. How the sample reports are chosen and how to send these sample reports for moderation. It also includes the two forms, 'Record...