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Experimental programme & IA
Determining the pKa of a weak acid
This Higher Level practical gives your students practice at determining the pKa of a weak acid by two different methods. This practical involves a strong acid - strong alkali titration using a pH probe...
Experimental programme & IA
Titrations with a pH meter
This practical gives students experience of using a pH meter to cover permutations of strong and weak acid titrations with strong and weak bases. It also lends itself well to data logging to record the...
Experimental programme & IA
Acid-alkali titration
This practical is a relatively straightforward acid-base titration problem to determine the amount of water of crystallisation in crystals of ethane-1,2-dioic acid (commonly known as oxalic acid) which...
Experimental programme & IA
Determining Kc for an esterification reaction
This practical uses the method of titration to determine the value of the equilibrium constant for the esterification reaction between ethanol and ethanoic acid. Although the reaction of alcohols with...
Experimental programme & IA
Le Chatelier's principle
This practical illustrates the principles of dynamic equilibrium using colour changes and also introduces students to microscale chemistry by using only one or two drops of each chemical solution. Using...
Experimental programme & IA
Determining Ea for a reaction
This practical is a really neat extension of the “cross on a tile” experiment which enables Higher Level students to determine the activation energy for the reaction. This is one of the few practicals...
Experimental programme & IA
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...
Experimental programme & IA
Rate-dependent factors
The “cross on a tile” experiment to show the reaction between thiosulfate ions and an acid is one of the classic high school chemistry experiments but it is well worth doing to illustrate how the rate...
Experimental programme & IA
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...
Experimental programme & IA
Preparation of nylon 6,6
The preparation of nylon 6,6 is a fun practical to do and gives students hands-on experience of carrying out a polycondensation reaction (covered in AHL S2.4.6) and practice at writing relevant equations...