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Three A-Level chemistry programs designed to be used in the same way as the company's Chemical Analysis. The first program. IR. deals with infrared spectroscopy which I found was not in my A-Level syllabus, and was difficult to understand and follow.

The booklet. usually very good, was sparse. However, to be fair it did look impressive. A graph of a spectrum of a simple organic compound is shown. You then have to guess the number of various atoms which constituted one molecule.

PH curves may be drawn and, by using different limits. obtain varying degrees of accuracy. A short test is followed by one on the mathematics of titration curves where you must correct errors in given statements. A calculation of the pH of solutions employing a good press to reveal line by line system follows. A very good program that I would highly rate.

Organal displays a list of 18 organic compounds covering a range of functional groups. There is a list of questions that may be asked by the student. A good program.

K.I.