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It is becoming increasingly difficult to determine the composition of food dyes in an unknown mixture, because formulations have been altered over time, and, as a consequence, the results never match .. more
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- From the Director (the importance of practical work)- Return to school September 2020 guidance- Keeping your membership up to date- Alternatives to cheek cells- Food tests- Chemical store poster (go.. more
words matched: indicators, pH

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This activity can be used as an introduction to microscale drop, or “puddle” chemistry. It demonstrates that indicators do not always change at pH7.
words matched: indicators, pH

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Guidance outlining the different types of indicator used for making agar cubes for diffusion. It covers how to prepare, use and store the agar. 
words matched: indicators, pH

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Contains a wealth of information on the various ways of measuring pH, and the advantage and disadvantage os each. Includes all sorts of background theory which will help the reader make the most appro.. more
words matched: indicators, pH

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This edition includes notes on confusion over universal indicators; advice on demonstrating the thermit (thermite) reaction, issues with new laboratories, and information for teachers of D&T on pu.. more
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Gives guidance on general fieldwork including specific measurements and techniques. Detailed guidance is included on measuring substances in the soil, water and air, and electronic measurements such a.. more
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Explains what is meant by environmental monitoring, and the range of equipment available. Describes in detail each of the parameters which can be monitored including possible difficulties. Also descri.. more
words matched: indicators, pH

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This edition includes notes on the introduction of Student Safety Sheets, a new standard for eye protection, a brief comparison between ducted and recirculatory fume cupboards, problems with (so-calle.. more
words matched: indicators, pH

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Another jam packed edition of the Bulletin :-- Fake news from the Director - Update on the renewal process- Who pays for CLEAPSS membership- Gatsby project update- Using light bulbs in biology- Online.. more
words matched: indicators, pH

Showing results 1 to 10 of 207
1 234