Listing all results (13)

Electrons at Work

Written by F.C. Brown and published by the English Universities Press, this book contains a broad selection of experiments designed to help students understand the close relationship between chemical activity and the movement of electrons.

The activities aim to stimulate an investigative approach. They can...

Publication date:
1960 - 1969

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Experiments with Aluminium

Written by F.C. Brown and published by the English Universities Press, this book contains information about experiments relating to aluminium or its compounds. Aluminium is a very familiar metal and its properties offer interesting possibilities for experiment.

The instructions contain teacher guidance and...

Publication date:
1960 - 1969

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The Preparation of Soap

This Unilever Laboratory Experiment describes the preparation of soap from a mixture of cooking oil and dripping. The leaflet was first published in 1964 and so lacks modern safety guidance. The procedure is authentic; it is designed to produce a convincing sample of soap. This means that it could be the basis of...

Publication date:
1960 - 1969

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The Preparation of Sodium Alkyl Benzene Sulphonate

The method of preparation of a sulphonate paste described in this Unilever Laboratory Experiment is basically the same as that used by Unilever in the large-scale production of soapless detergents at the time of publication in 1964. The required reactants included an alkylbenzene hydrocarbon supplied by the...

Publication date:
1960 - 1969

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The Hydrogenation of Soft Oils

Details of this challenging experiment were published in this leaflet from the Unilever Laboratory Experiment in 1965. Requirements included a pyrophoric nickel catalyst supplied by Unilever, hydrogen from a cylinder and a vegetable oil treated with activated charcoal to remove impurities. The necessary apparatus...

Publication date:
1960 - 1969

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Determination of the Total Hardness of Water

This Unilever Laboratory Experiment, published in 1970, describes the procedure for a titration with EDTA and Eriochrome Black T to determine the total hardness of water. The details cover the preparation of a standard solution of EDTA as well as the steps of the titration.

Publication date:
1960 - 1969

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Isolation of Oil of Clove Followed by Extraction of Eugenol

This Unilever Laboratory Experiment, published in 1966, describes the use of steam distillation to separate oil from crushed cloves. The method for extracting the eugenol from the oil used carbon tetrachloride (tetrachloromethane) and so would need to be modified before this could now be done in schools and...

Publication date:
1960 - 1969

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Making an Emulsion

This Unilever Laboratory Experiment, published in 1966, demonstrates that mineral oil and water form an oil-in-water emulsion when sodium oleate is the emulsifier, and a water-in-oil emulsion when calcium oleate is the emulsifier. Water-soluble and oil-soluble dyes are used to distinguish the two types of emulsion...

Publication date:
1960 - 1969

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Supercontraction of Hair

This Unilever Laboratory Experiment, published in 1967, describes an experiment to measure the contraction of hair in a hot solution of phenol. The procedure is based on a school-made apparatus to measure the changes of length. The results are discussed in terms of hydrogen bonding and disulphide bonds between...

Publication date:
1960 - 1969

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The Rusting of Steel

This Unilever Laboratory Experiment, published in 1969, gives the procedure for using corrosion (ferroxyl) indicator to demonstrate anodic and cathodic areas on the surface of steel as it corrodes.

Publication date:
1960 - 1969

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